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BEGIN:VEVENT
SUMMARY:Hertz Lecture
DTSTART;VALUE=DATE-TIME:20160929T153000Z
DTEND;VALUE=DATE-TIME:20160929T163000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17528@indico.desy.de
DESCRIPTION:Speakers: Nathan Seiberg ()\nhttps://indico.desy.de/event/1479
5/contributions/17528/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17528/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Restriction on the initial state for the absence of IR effect in s
ingle field inflation
DTSTART;VALUE=DATE-TIME:20160930T101000Z
DTEND;VALUE=DATE-TIME:20160930T104000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17529@indico.desy.de
DESCRIPTION:Speakers: Takahiro Tanaka ()\nIt has been claimed that the sup
er Hubble modes generated during inflation can make loop corrections diver
ge. Even if we introduce an infrared (IR) cutoff at a comoving scale as an
ad hoc but a practical way for the regularization\, we encounter the \nse
cular growth\, which may lead to the breakdown of perturbative expansion f
or a sufficiently long lasting inflation. We show that the IR pathology
can be attributed to the presence of residual gauge degrees of freedom in
the local observable universe. \nWe will show that choosing the Euclidean
vacuum as the initial state ensures the invariance under the above-mention
ed residual gauge transformations. We will also show that as long as we co
nsider a gauge invariant quantity in the local universe\, \nwe encounter n
either the IR divergence nor the secular growth.\n\nhttps://indico.desy.de
/event/14795/contributions/17529/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17529/
END:VEVENT
BEGIN:VEVENT
SUMMARY:RG Inequalities in Diverse Dimensions
DTSTART;VALUE=DATE-TIME:20160930T093000Z
DTEND;VALUE=DATE-TIME:20160930T100000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17530@indico.desy.de
DESCRIPTION:Speakers: Thomas Dumitrescu ()\nhttps://indico.desy.de/event/1
4795/contributions/17530/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17530/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Four-jet production in single- and double-parton scattering within
high-energy factorisation
DTSTART;VALUE=DATE-TIME:20160928T143500Z
DTEND;VALUE=DATE-TIME:20160928T145500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17531@indico.desy.de
DESCRIPTION:Speakers: Andreas van Hameren (IFJ PAN)\nWe present a phenomen
ological study of 4-jet production\, calculated\nwithin high-energy factor
ization\, including both contributions from\nsingle-parton and double-part
on scattering. High-energy\nfactorization causes a momentum inbalance in t
he final state\,\nallowing for the description of observables at tree-leve
l that would\nrequire next-to-leading order precision in collinear factori
zation.\nThe momentum inbalance is caused by non-vanishing transverse\nmom
entum components for the initial-state partons which thus are\noff-shell.
We will clarify how to define gauge invariant scattering\namplitudes with
off-shell partons\, and how to calculate them\nefficiently.\n\nhttps://ind
ico.desy.de/event/14795/contributions/17531/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17531/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Two-loop Bhabha Scattering at High Energy beyond Leading Power
DTSTART;VALUE=DATE-TIME:20160929T124000Z
DTEND;VALUE=DATE-TIME:20160929T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17532@indico.desy.de
DESCRIPTION:Speakers: Nikolai Zerf (ITP University of Heidelberg)\nWe pres
ent the evaluation of the two-loop ${\\cal O}(m_e^2/s)$ contribution to th
e wide-angle high-energy electron-positron scattering in the double-logari
thmic approximation. \nThe origin and the general structure of the power-s
uppressed \ndouble logarithmic corrections are discussed.\n\nhttps://indic
o.desy.de/event/14795/contributions/17532/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17532/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Two-Loop Corrections to the Higgs Masses in the Complex MSSM
DTSTART;VALUE=DATE-TIME:20160929T122000Z
DTEND;VALUE=DATE-TIME:20160929T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17533@indico.desy.de
DESCRIPTION:Speakers: Sebastian Paßehr (DESY)\nThe discovery of a Higgs-l
ike particle at the LHC has triggered considerable ongoing effort to revea
l its nature and properties. The mass of the particle is one of its basic
properties\; due to the high-precision mass measurement\, higher-order cal
culations are necessary to make competitive predictions. Although with cur
rent experimental results the particle could be identified as the Standard
Model Higgs boson\, other explanations in extended models are possible. I
n the theoretically well motivated Minimal Supersymmetric Standard Model (
MSSM) the discovered particle could be one state of a richer Higgs-boson s
pectrum.\n\nI will present the most recent status of the Higgs-particle sp
ectrum in the CP-violating MSSM in the Feynman-diagrammatic approach with
non-trivial renormalization. The effect of new two-loop contributions of t
he order α_t α_b + α_b^2 + α_any α_s is discussed and compared with t
he previously known two-loop corrections.\n\nhttps://indico.desy.de/event/
14795/contributions/17533/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17533/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Higgs instability during and after inflation
DTSTART;VALUE=DATE-TIME:20160929T131500Z
DTEND;VALUE=DATE-TIME:20160929T133000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17534@indico.desy.de
DESCRIPTION:Speakers: Marco Zatta (University of Helsinki)\nCurrent Higgs
boson and top quark data favour metastability of our vacuum which raises q
uestions as to why the Universe has chosen an energetically disfavoured st
ate and remained there during the primordial dynamics. In this talk I will
point out that allowing a simple Higgs-inflaton coupling can explain why
the Higgs ended up in the electroweak vacuum after inflation. I will show
that this coupling is present in many realistic models of reheating and th
us well motivated. I will also discuss the effects of the Higgs-inflaton c
oupling during the initial period of reheating\, also known as preheating\
, where the sizable production of Higgs particles can induce large fluctua
tions of the Higgs field which may destabilize the electroweak vacuum.\n\n
https://indico.desy.de/event/14795/contributions/17534/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17534/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing the geometry of BPS states with Spectral Networks
DTSTART;VALUE=DATE-TIME:20160928T143500Z
DTEND;VALUE=DATE-TIME:20160928T145500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17535@indico.desy.de
DESCRIPTION:Speakers: Pietro Longhi (Uppsala University)\nNew relations be
tween wall crossing invariants\, such as the BPS monodromy\, and various l
imits of superconformal indices of 4d N=2 theories have been recently prop
osed. For theories of class S on their Coulomb branches\, spectral network
s provide a way to compute BPS monodromies directly\, in a neighborhood of
the superconformal point. Several new results on BPS monodromies can be
obtained in this way\, bringing new insights into these correspondences.\n
\nhttps://indico.desy.de/event/14795/contributions/17535/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17535/
END:VEVENT
BEGIN:VEVENT
SUMMARY:High-energy scattering in N=4 super Yang-Mills and single-valued p
olylogs
DTSTART;VALUE=DATE-TIME:20160929T125000Z
DTEND;VALUE=DATE-TIME:20160929T131000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17536@indico.desy.de
DESCRIPTION:Speakers: Martin Sprenger (ETH Zürich)\nIn this talk\, I will
describe the connection between the high-energy limit of the six-gluon sc
attering amplitude in N=4 super Yang-Mills theory and a certain class of s
ingle-valued polylogarithmic functions.\nWhile the evaluation of the six-g
luon amplitude to high loop orders in general kinematics is a very difficu
lt problem\, the amplitude in the multi-Regge regime is governed by a disp
ersion-like integral which is fully known even at finite coupling.\nHoweve
r\, this dispersion-like integral is formulated in Fourier-Mellin space. O
btaining expressions in momentum space thus requires carrying out said int
egral which is tedious beyond the lowest loop orders.\nI will show how an
understanding of the mathematical structure of the single-valued polylogs
to which the integral evaluates gives rise to an efficient and algorithmic
evaluation of the amplitude and briefly mention extensions to higher-poin
t amplitudes.\n\nhttps://indico.desy.de/event/14795/contributions/17536/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17536/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Can massive primordial black holes be the dark matter?
DTSTART;VALUE=DATE-TIME:20160928T121500Z
DTEND;VALUE=DATE-TIME:20160928T123000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17537@indico.desy.de
DESCRIPTION:Speakers: Sebatien Clesse (RWTH Aachen University)\nThe recent
detection by Advanced LIGO of gravitational waves (GW) from the merging o
f a binary black hole system sets new limits on the merging rates of massi
ve primordial black holes (PBH) that could be identified to the dark matte
r in the Universe. If PBH are regrouped in clusters with a similar densi
ty to the one observed in ultra-faint dwarf galaxies\, merging rates are c
omparable to aLIGO expectations. Massive PBH dark matter predicts the exis
tence of thousands of those dwarf galaxies where star formation is unlikel
y because of gas accretion onto PBH\, which would possibly provide a solut
ion to the missing satellite and too-big-to-fail problems. Such PBH coul
d be produced in the early Universe\, due to the collapse of large density
fluctuations generated during a phase of hybrid inflation. A model easil
y embedded in high-energy frameworks such as supersymmetry. aLIGO and fu
ture GW antennas could be able measure the abundance and mass distribution
of PBH in the range 5 - 200 solar masses to 10% accuracy\, which could he
lp to reveal their nature\, with profound implications for cosmology and h
igh energy physics.\n\nhttps://indico.desy.de/event/14795/contributions/17
537/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17537/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum Simulation of Lattice Gauge Theories
DTSTART;VALUE=DATE-TIME:20160928T094000Z
DTEND;VALUE=DATE-TIME:20160928T101000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17538@indico.desy.de
DESCRIPTION:Speakers: Uwe-Jens Wiese ()\nBesides lattice QCD in particle p
hysics\, strongly coupled gauge theories arise\, for example\, in the cond
ensed matter physics of spin liquids\, or in the quantum information theor
y of Kitaev's toric code\, which is a Z(2) lattice gauge theory.\nNumerica
l simulations of gauge theories on classical computers\,\nin particular\,
at high fermion density or in out-of-equilibrium situations\, suffer from
severe sign problems that prevent the importance sampling underlying Monte
Carlo calculations. Quantum simulators are accurately controllable quantu
m devices that mimic other quantum systems. They do not suffer from sign p
roblems\, because their hardware is intrinsically quantum mechanical. Rece
ntly\, trapped ions\, following a laser-driven stroboscopic discrete time
evolution through a sequence of quantum gate operations\, have been used a
s a digital quantum \nsimulator for particle-anti-particle pair creation i
n the Schwinger model. \nAnalog quantum simulators\, on the other hand\, f
ollow the continuous time-evolution of a tunable model Hamiltonian. Using
ultra-cold atoms in optical lattices\, analog quantum simulators have been
designed for Abelian and non-Abelian lattice gauge theories. Their experi
mental realization is a challenge for the foreseeable future\, which holds
the promise to access the \nreal-time dynamics of string breaking\, the o
ut-of-equilibrium decay of a false vacuum\, or the evolution of a chiral c
ondensate after a quench\, from first principles. Quantum link models whic
h realize gauge theories including QCD not with classical fields but with
discrete quantum degrees of freedom\, are ideally \nsuited for implementat
ion in quantum matter. For example\, alkaline-earth atoms\, whose nuclear
spin represents an SU(N) degree of freedom\, naturally embody fermionic ri
shon constituents of gluons.\n\nhttps://indico.desy.de/event/14795/contrib
utions/17538/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17538/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Duality Web in 2 + 1 Dimensions and the Unity of Physics
DTSTART;VALUE=DATE-TIME:20160928T102000Z
DTEND;VALUE=DATE-TIME:20160928T105000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17539@indico.desy.de
DESCRIPTION:Speakers: Nathan Seiberg ()\nCombining insights from different
branches of physics we will present a rich set of dualities in 2+1 dimen
sions\n\nhttps://indico.desy.de/event/14795/contributions/17539/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17539/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum Field Theory Without Quantum Fields: Scattering Amplitudes
as Binary Code
DTSTART;VALUE=DATE-TIME:20160929T093000Z
DTEND;VALUE=DATE-TIME:20160929T101000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17540@indico.desy.de
DESCRIPTION:Speakers: Nima Arkani-Hamed ()\nhttps://indico.desy.de/event/1
4795/contributions/17540/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17540/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Constructing Gravity Theories from Gauge Theories
DTSTART;VALUE=DATE-TIME:20160929T074000Z
DTEND;VALUE=DATE-TIME:20160929T082000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17541@indico.desy.de
DESCRIPTION:Speakers: Henrik Johansson ()\nI will discuss how gravity scat
tering amplitudes of many different gravitational theories can be obtained
from various gauge theories through a double-copy procedure. The basic id
ea goes back to the old relation between open and closed strings\, but I w
ill argue that gravity being the double copy of two gauge theories is a mo
re general notion. I will present new striking examples of gravity theorie
s being double copies\, and identify the corresponding underlying gauge th
eories.\n\nhttps://indico.desy.de/event/14795/contributions/17541/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17541/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Worldsheet Models in Quantum Field Theory
DTSTART;VALUE=DATE-TIME:20160929T082000Z
DTEND;VALUE=DATE-TIME:20160929T090000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17542@indico.desy.de
DESCRIPTION:Speakers: Yvonne Geyer ()\nThe last years have seen remarkable
progress in understanding the scattering amplitudes of massless particles
in arbitrary dimension. They not only exhibit a simplicity completely obs
cured by the Feynman Diagram approach\, but also a structure strikingly re
miniscent of the worldsheet models describing string theory. After reviewi
ng the key developments\, I will discuss the worldsheet models\, derive th
e loop integrands\, and finally aim to draw some general conclusion about
scattering in massless theories.\n\nhttps://indico.desy.de/event/14795/con
tributions/17542/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17542/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrability in gauge and string theory
DTSTART;VALUE=DATE-TIME:20160929T070000Z
DTEND;VALUE=DATE-TIME:20160929T074000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17543@indico.desy.de
DESCRIPTION:Speakers: Romuald Janik ()\nIn this talk I will give an overvi
ew of various developments in integrability within the AdS/CFT corresponde
nce emphasizing novel directions and setups. I will also point out some ou
tstanding questions.\n\nhttps://indico.desy.de/event/14795/contributions/1
7543/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17543/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tensor Networks and their use for Lattice Gauge Theories
DTSTART;VALUE=DATE-TIME:20160929T101000Z
DTEND;VALUE=DATE-TIME:20160929T105000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17544@indico.desy.de
DESCRIPTION:Speakers: Mari Carmen Banuls ()\nThe term Tensor Network State
s (TNS) has become a common one in the context of numerical studies of qua
ntum many-body problems. It refers to a number of families that represent
different ansatzes for the efficient description of the state of a quantum
many-body system. The first of these families\, Matrix Product States (MP
S)\, lies at the basis of Density Matrix Renormalization Group methods\, w
hich have become the most precise tool for the study of one dimensional qu
antum many-body systems. Their natural generalization to two or higher dim
ensions\, the Projected Entanglement Pair States (PEPS) are good candidate
s to describe the physics of higher dimensional lattices. Another TNS ansa
tz\, the MERA\, has recently been connected to a discrete realization of t
he AdS/CFT correspondence.\n\nTNS can be used to study equilibrium propert
ies\, as ground and and thermal states\, but also dynamics. Quantum inform
ation gives us some tools to understand why these families are expected to
be good ansatzes for the physically relevant states\, and some of the lim
itations connected to the simulation algorithms.\n\nLattice Gauge Theories
\, in their Hamiltonian version\, offer a challenging scenario for these t
echniques. While the dimensions and sizes of the systems amenable to TNS s
tudies are still far from those achievable by Monte Carlo simulations\, Te
nsor Networks can be readily used for problems which more standard techniq
ues cannot easily tackle\, such as the presence of a chemical potential\,
or out-of-equilibrium dynamics.\n\nThe last years have seen an increasing
interest in this particular application of Tensor Network techniques. The
performance of Matrix Product States (MPS) has been explored in the case o
f the Schwinger model\, as a widely used testbench for lattice techniques.
The low energy states of the model\, away from any perturbative regime\,
have been shown to be well approximated by the MPS ansatz. The precision a
chieved by the method allows for accurate finite size and continuum limit
extrapolations of the ground state energy\, but also of the mass gaps and
temperature dependent quantities\, thus showing the feasibility of these t
echniques for gauge theory problems. The feasibility of the method has alr
eady been tested also for non-Abelian models\, out-of-equilibrium scenario
s\, and non-vanishing chemical potential.\n\nhttps://indico.desy.de/event/
14795/contributions/17544/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17544/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Locality and Quantum Physics: the Algebraic Approach to Quantum F
ield Theory
DTSTART;VALUE=DATE-TIME:20160930T070000Z
DTEND;VALUE=DATE-TIME:20160930T073000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17545@indico.desy.de
DESCRIPTION:Speakers: Klaus Fredenhagen ()\nThe locality of fundamental in
teractions and the nonlocal \ncharacter of quantum correlations are reconc
iled in the framework of algebraic quantum field theory. The theory is bas
ed on the concept of local fields which are mathematically characterized a
s natural tranformations between suitable functors. The framework covers q
uantum field theories on generic Lorentzian manifolds including also pertu
rbative quantum gravity.\n\nhttps://indico.desy.de/event/14795/contributio
ns/17545/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17545/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Conformal bootstrap overview
DTSTART;VALUE=DATE-TIME:20160930T074000Z
DTEND;VALUE=DATE-TIME:20160930T081000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17546@indico.desy.de
DESCRIPTION:Speakers: Balt Van Rees ()\nIn this talk we will give an overv
iew of recent results obtained from the bootstrap approach to CFTs. We wil
l discuss both analytical and numerical results\, including for supersymme
tric theories. We identify several promising directions for further resear
ch\n\nhttps://indico.desy.de/event/14795/contributions/17546/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17546/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Unitarity and positivity constraints for CFT at large and central
charge
DTSTART;VALUE=DATE-TIME:20160930T082000Z
DTEND;VALUE=DATE-TIME:20160930T085000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17547@indico.desy.de
DESCRIPTION:Speakers: Luis Fernando Alday ()\nhttps://indico.desy.de/event
/14795/contributions/17547/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17547/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Falsifying Baryogenesis Mechanisms through Observation of Lepton N
umber and Flavor Violation
DTSTART;VALUE=DATE-TIME:20160928T153000Z
DTEND;VALUE=DATE-TIME:20160928T154500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17548@indico.desy.de
DESCRIPTION:Speakers: Julia Harz (ILP / LPTHE Paris)\nInteractions that ma
nifest themselves as lepton number violating processes at low energies in
combination with sphaleron transitions typically erase any pre-existing b
aryon asymmetry of the Universe. We demonstrate in a model independent ap
proach that the observation of neutrinoless double beta decay would impose
a stringent constraint on mechanisms of high-scale baryogenesis\, includi
ng leptogenesis scenarios. Further\, we discuss the potential of the LHC
to model independently exclude high-scale leptogenesis scenarios when obse
rving lepton number violating processes. In combination with the observati
on of lepton flavor violating processes\, we can further strengthen this a
rgument\, closing the loophole of asymmetries being stored in different le
pton flavors.\n\nhttps://indico.desy.de/event/14795/contributions/17548/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17548/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Strongly Coannihilating Dark Matter at the LHC
DTSTART;VALUE=DATE-TIME:20160928T120000Z
DTEND;VALUE=DATE-TIME:20160928T122000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17549@indico.desy.de
DESCRIPTION:Speakers: Maikel de Vries (JGU Mainz)\nThe coannihilation mech
anism plays a crucial role in determining the DM relic abundance in a plet
hora of new physics models. Recently\, a general classification of simplif
ied models for this mechanism has been presented in the Coannihilation cod
ex. In particular\, the thermal relic abundance of a pure Standard Model s
inglet DM candidate can naturally be explained by coannihilation with a ne
w colored partner in the dark sector. In these models direct and indirect
detection modes are suppressed\, however\, LHC probes provide striking sig
natures. On the one hand\, a mediator which connects the DM and its colore
d partner to the visible sector gives rise to a novel dijet resonance plus
missing transverse energy final state. In the case where the mediator lie
s beyond LHC detection\, self-annihilation of the colored partner through
its strong interactions solely determines the relic abundance. The major L
HC signature then is pair-production of the colored partner leading to jet
s plus missing transverse energy.\n\nhttps://indico.desy.de/event/14795/co
ntributions/17549/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17549/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Progress in constructing epsilon form of differential equations fo
r master integrals with Fuchsia
DTSTART;VALUE=DATE-TIME:20160928T153500Z
DTEND;VALUE=DATE-TIME:20160928T155500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17550@indico.desy.de
DESCRIPTION:Speakers: Oleksandr Gituliar (Institute of Nuclear Physics\, P
olish Academy of Sciences)\nWe review Fuchsia: an open-source tool for con
structing epsilon form of differential equations for Feynman master integr
als based on the Lee algorithm. We show several examples of its applicatio
n to various problems in Quantum Field Theory which require virtual and re
al momenta integration. We discuss current status of the project and possi
ble extensions in the future.\n\nhttps://indico.desy.de/event/14795/contri
butions/17550/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17550/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex structures and zero-curvature equations for sigma-models
DTSTART;VALUE=DATE-TIME:20160928T122000Z
DTEND;VALUE=DATE-TIME:20160928T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17551@indico.desy.de
DESCRIPTION:Speakers: Dmitri Bykov (Max-Planck-Institut fur Gravitationsph
ysik)\nWe construct zero-curvature representations for the equations of mo
tion of a class of sigma-models with complex homogeneous target spaces\, n
ot necessarily symmetric. We show that in the symmetric case the proposed
flat connection is gauge-equivalent to the conventional one.\n\nhttps://in
dico.desy.de/event/14795/contributions/17551/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17551/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The semi-classical energy of rotating Nambu-Goto strings
DTSTART;VALUE=DATE-TIME:20160928T124000Z
DTEND;VALUE=DATE-TIME:20160928T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17552@indico.desy.de
DESCRIPTION:Speakers: Jochen Zahn (Universität Leipzig)\nIn the sense of
perturbation theory around arbitrary classical solutions\, the Nambu-Goto
(NG) string can be consistently quantised as an effective theory for any d
imension $D$ of the target space [Comm. Math. Phys. 327 (2014) 779\, with
D. Bahns & K. Rejzner]. In this framework\, we compute semi-classical corr
ections to the energy of rotating NG strings\, using the locally covariant
renormalisation scheme developed in the context of QFT on curved space-ti
mes by Hollands & Wald. For the open NG string\, we find that the energy d
ensity diverges in a non-integrable way at the boundaries. Regularizing th
ese divergences with boundary counterterms\, we find the Regge intercept $
a=1 + (D-2)/24$. For the closed NG string\, the energy density is finite a
nd yields the same intercept. For this value of $a$\, the NG string can no
t be quantised consistently in the covariant scheme for any dimension. [ba
sed on arXiv:1605.07928]\n\nhttps://indico.desy.de/event/14795/contributio
ns/17552/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17552/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Master Symmetry for Holographic Wilson Loops
DTSTART;VALUE=DATE-TIME:20160929T131000Z
DTEND;VALUE=DATE-TIME:20160929T133000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17553@indico.desy.de
DESCRIPTION:Speakers: Florian Loebbert (Humboldt University Berlin)\nRecen
tly\, Wilson loops in strongly coupled AdS/CFT were found to be invariant
under a curious one-parameter family of deformations. In this talk we anal
yze the nonlocal symmetry underlying this observation. We show that it act
s as a raising operator on the Yangian charges and generates the spectral
parameter of the model. We also speculate about the possibility to extend
this symmetry beyond the strong-coupling limit.\n\nhttps://indico.desy.de/
event/14795/contributions/17553/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17553/
END:VEVENT
BEGIN:VEVENT
SUMMARY:N=2 SUSY field theories: A window into nonperturbative QFT ?
DTSTART;VALUE=DATE-TIME:20160927T152000Z
DTEND;VALUE=DATE-TIME:20160927T155000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17554@indico.desy.de
DESCRIPTION:Speakers: Joerg Teschner ()\nConsiderable progress has been ma
de in the last few years on various N=2 supersymmetric field theories. The
progress includes exact results for expectation values of Wilson loop obs
ervables and various other quantities.\nIn my talk I will review some of t
hese developments\, and try to extract some lessons of general interest fo
r a wider audience with interests in quantum field theory.\n\nhttps://indi
co.desy.de/event/14795/contributions/17554/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17554/
END:VEVENT
BEGIN:VEVENT
SUMMARY:C-theorems and Entanglement Entropy
DTSTART;VALUE=DATE-TIME:20160927T144000Z
DTEND;VALUE=DATE-TIME:20160927T151000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17555@indico.desy.de
DESCRIPTION:Speakers: Marina Huerta ()\nA great part of the problem of und
erstanding the structure of the space of quantum field theories (QFT) is a
rguably reduced to the one of classifying possible critical points. In thi
s picture\, the theories with mass scales are obtained by perturbing criti
cal points and following the renormalization group (RG) trajectories. Howe
ver\, interestingly\, in the flow not all critical points can be joined wi
th each other: there are constraints provided by c-theorems. These state t
hat certain c-charge decreases from the UV to the IR fixed points showing
the irreversible character of the RG flow. \n\nThe idea of relating the c-
theorem with entanglement entropy is motivated by the result that central
charges can be identified as coefficients of entanglement entropy for even
dimensional space-time theories. In this scenario\, the coefficient of th
e logarithmic term and the constant term in the entropy were suggested as
c-functions\, for even and odd dimensional theories respectively. We will
discuss the d = 2 and 3 cases\, where this proposal was confirmed\n\nhttps
://indico.desy.de/event/14795/contributions/17555/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17555/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vector boson pair production in gluon fusion including interferenc
e effects with off-shell Higgs at the LHC
DTSTART;VALUE=DATE-TIME:20160928T122000Z
DTEND;VALUE=DATE-TIME:20160928T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17556@indico.desy.de
DESCRIPTION:Speakers: Lorenzo Tancredi (KIT Karlsruhe)\nWe will report on
the recent calculation of the NLO QCD corrections to vector boson pair pro
duction in gluon fusion\, focussing in particular on its interference with
the Higgs signal. In particular\, as it was shown by Caola and Melnikov\,
assessing the impact of the interference on the signal and background cro
ss sections in the high energy tail (i.e. for an off-shell Higgs) is cruci
al to put stringent constraints on the width of the Higgs. This\, in turn\
, is important to allow precise measurements of the Higgs couplings. Moreo
ver\, studying the interference at high invariant masses is very interesti
ng to confirm the EWSB mechanism\; the interference is\, in fact\, expecte
d to be strong and destructive\, as the Higgs boson is supposed to unitari
ze the scattering amplitudes of massive fermions and gauge bosons.\n\nhttp
s://indico.desy.de/event/14795/contributions/17556/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17556/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome
DTSTART;VALUE=DATE-TIME:20160928T070000Z
DTEND;VALUE=DATE-TIME:20160928T071000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17557@indico.desy.de
DESCRIPTION:Speakers: Joachim Mnich ()\nhttps://indico.desy.de/event/14795
/contributions/17557/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17557/
END:VEVENT
BEGIN:VEVENT
SUMMARY:UV Completion of Some UV Fixed Points
DTSTART;VALUE=DATE-TIME:20160927T121000Z
DTEND;VALUE=DATE-TIME:20160927T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17558@indico.desy.de
DESCRIPTION:Speakers: Igor Klebanov ()\nWe start by reviewing UV completio
n of the Gross-Neveu model in dimensions between two and four via the Gros
s-Neveu-Yukawa model\,\nwhich is a multi-flavor Yukawa theory. We discuss
the operator scaling dimensions and the sphere free energy for these Confo
rmal Field Theories.\nThe case of a single two-component Majorana fermion
is special in that the theory appears to flow to a CFT with emergent super
symmetry\, and we provide\nevidence for this using 4-epsilon expansions. W
e also discuss the O(N) symmetric scalar theory in dimensions between four
and six\, where it appears to be\nunitary to all orders in the 1/N expans
ion\, and propose its UV completion in terms of a cubic theory.\nIn 6-epsi
lon dimensions this O(N) symmetric cubic theory has an IR stable fixed poi
nt for N>1038. We conclude\nwith comments on continuation of this theory t
o five dimensions.\n\nhttps://indico.desy.de/event/14795/contributions/175
58/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17558/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome
DTSTART;VALUE=DATE-TIME:20160927T120000Z
DTEND;VALUE=DATE-TIME:20160927T121000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17559@indico.desy.de
DESCRIPTION:Speakers: Gleb Arutyunov ()\nhttps://indico.desy.de/event/1479
5/contributions/17559/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17559/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Numerical Stochastic Perturbation Theory
DTSTART;VALUE=DATE-TIME:20160927T133000Z
DTEND;VALUE=DATE-TIME:20160927T140000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17560@indico.desy.de
DESCRIPTION:Speakers: Francesco Di Renzo ()\nPerturbation theory for latti
ce regularization of field theory is known to be a quite hard subject and
this holds true in particular for lattice gauge theory. In the 90's the n
umerical \nimplementation of stochastic perturbation theory (NSPT) was in
troduced. NSPT can not only make perturbative computations on the lattice
(in some cases much) easier\, but also enable the computation of extremel
y high orders. We will discuss foundations and key features of NSPT and re
view a few significant computations which were made possible by NSPT.\n\nh
ttps://indico.desy.de/event/14795/contributions/17560/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17560/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Yang-Mills gradient flow -- a new tool in non-perturbative QFT
DTSTART;VALUE=DATE-TIME:20160927T125000Z
DTEND;VALUE=DATE-TIME:20160927T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17561@indico.desy.de
DESCRIPTION:Speakers: Martin Luescher ()\nThe Yang-Mills gradient flow pro
vides new insight into the dynamics of non-Abelian gauge theories and has
become a widely used tool in lattice QCD. In this talk\, the theoretical f
oundation of the flow is reviewed and some of its applications are briefly
described.\n\nhttps://indico.desy.de/event/14795/contributions/17561/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17561/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Realizing the Relaxion with N-site Models
DTSTART;VALUE=DATE-TIME:20160928T132000Z
DTEND;VALUE=DATE-TIME:20160928T134000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17562@indico.desy.de
DESCRIPTION:Speakers: Nayara Fonseca (DESY)\nRelaxion models are an intere
sting new avenue to explain the radiative stability of the Standard Model
scalar sector. They require very large field excursions\, which are diffic
ult to generate in a consistent UV completion and to reconcile with the co
mpact field space of the relaxion. We propose an N-site model which natura
lly generates the large decay constant needed to address these issues. Our
model offers distinct advantages with respect to previous proposals: the
construction involves non-abelian fields\, allowing for controlled high en
ergy behaviour and more model building possibilities\, both in particle ph
ysics and inflationary models\, and also admits a continuum limit when the
number of sites is large\, which may be interpreted as a warped extra dim
ension.\n\nhttps://indico.desy.de/event/14795/contributions/17562/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17562/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The strong coupling of three flavor QCD
DTSTART;VALUE=DATE-TIME:20160928T151500Z
DTEND;VALUE=DATE-TIME:20160928T153500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17563@indico.desy.de
DESCRIPTION:Speakers: Tomasz Korzec (Bergische Universität Wuppertal)\nI
will present the ALPHA collaboration's latest calculation of the\nLambda p
arameter of QCD. Our method relies\non experimental inputs of low energy q
uantities like pseudo-scalar \ndecay constants only. The scale dependence
of a coupling in a finite volume\nrenormalization scheme is computed non-p
erturbatively \nin lattice QCD over many orders of magnitude\nin the energ
y scale. At high energies perturbation theory is safely \napplied to obtai
n the Lambda parameter in any scheme.\n\nhttps://indico.desy.de/event/1479
5/contributions/17563/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17563/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Testing keV sterile neutrino dark matter in future direct detectio
n experiments
DTSTART;VALUE=DATE-TIME:20160928T151500Z
DTEND;VALUE=DATE-TIME:20160928T153000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17564@indico.desy.de
DESCRIPTION:Speakers: Miguel Campos (Max-Planck-Institut für Kernphysik)\
nWe determine constraints on sterile neutrino warm dark matter through dir
ect detection experiments\, taking XENON100\, XENON1T and DARWIN as exampl
e. While not competitive with astrophysical constraints from X-ray data\,
the constraints are the first direct laboratory bounds on sterile neutrino
warm dark matter\, and will be in some parts of parameter space the stron
gest limits on keV-scale neutrinos.\n\nhttps://indico.desy.de/event/14795/
contributions/17564/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17564/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Z-theory — non-linear sigma model amplitudes and more from open
strings
DTSTART;VALUE=DATE-TIME:20160929T123000Z
DTEND;VALUE=DATE-TIME:20160929T125000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17565@indico.desy.de
DESCRIPTION:Speakers: Oliver Schlotterer (AEI Potsdam)\nIn this talk we de
rive the tree-level S-matrix of the effective theory of\nGoldstone bosons
known as the non-linear sigma model (NLSM) from \nstring theory. This nove
l connection relies on a recent realization of tree-level \nopen-superstri
ng S-matrix predictions as a double copy of super-Yang--Mills theory\nwith
Z-theory --- the collection of putative scalar effective field theories \
nencoding all the alpha'-dependence of the open superstring. \nHere we id
entify the color-ordered amplitudes of the NLSM as the low-energy\nlimit
of abelian Z-theory. This realization also provides\nnatural higher-deriv
ative corrections to the NLSM amplitudes arising from \nhigher powers of a
lpha' in the abelian Z-theory amplitudes\, and through double copy \nalso
to Born--Infeld and Volkov--Akulov theories. The Kleiss--Kuijf \nand Bern-
-Carrasco--Johansson relations obeyed by Z-theory amplitudes thereby \napp
ly to all alpha'-corrections of the NLSM. As such we naturally obtain \na
cubic-graph parameterization for the abelian Z-theory predictions \nwhose
kinematic numerators obey the duality between color and kinematics \nto al
l orders in alpha'.\n\nhttps://indico.desy.de/event/14795/contributions/17
565/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17565/
END:VEVENT
BEGIN:VEVENT
SUMMARY:From Yang-Mills Theory to the Veneziano Amplitude
DTSTART;VALUE=DATE-TIME:20160928T075000Z
DTEND;VALUE=DATE-TIME:20160928T082000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17566@indico.desy.de
DESCRIPTION:Speakers: Zohar Komargodsky ()\nWe consider weakly-coupled the
ories of massive higher-spin particles. This class of models includes\, fo
r instance\, tree-level String Theory and Large-N Yang-Mills theory. The S
-matrix in such theories is a meromorphic function obeying unitarity and c
rossing symmetry. We discuss the unphysical high-energy fixed imaginary an
gle scattering regime. We expect the amplitude to be universal and exponen
tially large in this limit. We develop methods to study this regime and sh
ow that the amplitude necessarily coincides with the Veneziano amplitude t
here. Our analysis shows that any such theory of higher-spin particles has
stringy excitations and infinitely many asymptotically parallel subleadin
g trajectories. More generally\, we argue that\, under some assumptions\,
any theory with at least one higher-spin particle must have strings.\n\nht
tps://indico.desy.de/event/14795/contributions/17566/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17566/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantization of super-Teichmuller theory
DTSTART;VALUE=DATE-TIME:20160928T153000Z
DTEND;VALUE=DATE-TIME:20160928T154500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17567@indico.desy.de
DESCRIPTION:Speakers: Nezhla Aghaei (DESY)\nhttps://indico.desy.de/event/1
4795/contributions/17567/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17567/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The N=2 superconformal bootstrap
DTSTART;VALUE=DATE-TIME:20160929T140500Z
DTEND;VALUE=DATE-TIME:20160929T142500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17568@indico.desy.de
DESCRIPTION:Speakers: Pedro Liendo (DESY)\nhttps://indico.desy.de/event/14
795/contributions/17568/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17568/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Prospects for Supersymmetry after current LHC results
DTSTART;VALUE=DATE-TIME:20160929T132000Z
DTEND;VALUE=DATE-TIME:20160929T134000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17569@indico.desy.de
DESCRIPTION:Speakers: Emanuele A. Bagnaschi (DESY)\nhttps://indico.desy.de
/event/14795/contributions/17569/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17569/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SUSY parameters from higgsino measurements in high-energy electron
-positron collisions
DTSTART;VALUE=DATE-TIME:20160929T132000Z
DTEND;VALUE=DATE-TIME:20160929T134000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17570@indico.desy.de
DESCRIPTION:Speakers: Suvi-Leena Lehtinen (DESY)\nhttps://indico.desy.de/e
vent/14795/contributions/17570/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17570/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recommendations for PDF usage in LHC predictions
DTSTART;VALUE=DATE-TIME:20160928T145500Z
DTEND;VALUE=DATE-TIME:20160928T151500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17571@indico.desy.de
DESCRIPTION:Speakers: Maria Vittoria Garzelli (Hamburg University)\nhttps:
//indico.desy.de/event/14795/contributions/17571/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17571/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CheckMATE: Confronting New Physics Model with LHC Data
DTSTART;VALUE=DATE-TIME:20160929T130000Z
DTEND;VALUE=DATE-TIME:20160929T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17572@indico.desy.de
DESCRIPTION:Speakers: Daniel Schmeier (Bonn University)\nhttps://indico.de
sy.de/event/14795/contributions/17572/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17572/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Observing the Top Energy Asymmetry at the LHC
DTSTART;VALUE=DATE-TIME:20160929T150500Z
DTEND;VALUE=DATE-TIME:20160929T152500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17573@indico.desy.de
DESCRIPTION:Speakers: Susanne Westhoff (Heidelberg University)\nhttps://in
dico.desy.de/event/14795/contributions/17573/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17573/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structure constants in N=4 SYM from the OPE and from integrability
DTSTART;VALUE=DATE-TIME:20160928T130000Z
DTEND;VALUE=DATE-TIME:20160928T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17574@indico.desy.de
DESCRIPTION:Speakers: Burkhard Eden ()\nThree-point functions of generic g
auge invariant composite operators in N=4 SYM are very hard to construct i
n higher-order weak-coupling perturbation theory. On the other hand\, thre
e-point functions of half-BPS operators are non-renormalised\, and guided
by symmetry principles the integrands for their four-point functions can b
e constructed to high loop order at least in the planar theory. We sketch
this approach and explain how the three-point couplings of two half-BPS an
d one twist two operator can be found by a double OPE limit on four-point
functions. We present new results at four loops obtained by the technique
of asymptotic expansions. Second\, we discuss the calculation of the same
class of structure constants at three loops using the recently proposed he
xagon formalism.\n\nhttps://indico.desy.de/event/14795/contributions/17574
/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17574/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing the electroweak interactions of top quarks at the LHC
DTSTART;VALUE=DATE-TIME:20160929T140500Z
DTEND;VALUE=DATE-TIME:20160929T142500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17575@indico.desy.de
DESCRIPTION:Speakers: Markus Schulze (HU Berlin)\nhttps://indico.desy.de/e
vent/14795/contributions/17575/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17575/
END:VEVENT
BEGIN:VEVENT
SUMMARY:NLO+PS for ttbar and Wt production and decay including non-resonan
t and interference effects
DTSTART;VALUE=DATE-TIME:20160929T144500Z
DTEND;VALUE=DATE-TIME:20160929T150500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17576@indico.desy.de
DESCRIPTION:Speakers: Jonas Lindert (Zurich University)\nhttps://indico.de
sy.de/event/14795/contributions/17576/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17576/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wedge-local fields in interacting quantum field theories with boun
d states
DTSTART;VALUE=DATE-TIME:20160929T142500Z
DTEND;VALUE=DATE-TIME:20160929T144500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17577@indico.desy.de
DESCRIPTION:Speakers: Daniela Cadamuro (Universität Göttingen)\nIn the c
ontext of constructing interacting quantum field theories in the operator-
algebraic approach\, wedge-local fields play an important role. After the
work of Lechner to construct factorizing scattering matrix models with sca
lar S-matrices without bound states\, we recently extended this constructi
on to the Z(N)-Ising model and the A_N-1 affine Toda field theories\, name
ly models with a richer particle spectrum and which are believed to have b
ound states. This construction is done by exhibiting wedge-local fields wh
ich arise as a deformation of Lechner's fields with the so called ``bound
state operator''. In this talk I will review the passages of this construc
tion and explain the open problems.\n\nhttps://indico.desy.de/event/14795/
contributions/17577/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17577/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lepton-flavour violation in a Pati-Salam model with gauged flavour
symmetry
DTSTART;VALUE=DATE-TIME:20160928T130000Z
DTEND;VALUE=DATE-TIME:20160928T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17578@indico.desy.de
DESCRIPTION:Speakers: Paul Moch (Theoretische Physik 1 Elementarteilchenph
ysik Uni Siegen)\nCombining Pati-Salam (PS) and flavour symmetries in a re
normalisable setup\, \nwe devise a scenario which produces realistic masse
s for the charged\nleptons. Flavour-symmetry breaking scalar fields in the
adjoint\nrepresentations of the PS gauge group are responsible for genera
ting different\nflavour structures for up- and down-type quarks as well as
for leptons.\nThe model is characterised by new heavy fermions which mix
with the Standard\nModel quarks and leptons. In particular\, the partners
for the third fermion\ngeneration induce sizeable sources of flavour viola
tion. Focusing on the\ncharged-lepton sector\, we scrutinise the model wit
h respect to its\nimplications for lepton-flavour violating processes such
as $\\mu \\rightarrow\ne\\gamma$\, $\\mu\\rightarrow 3e$ and muon conver
sion in nuclei.\n\nhttps://indico.desy.de/event/14795/contributions/17578/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17578/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leptogenesis from Oscillations of Heavy Neutrinos with Large Mixin
g Angles
DTSTART;VALUE=DATE-TIME:20160928T141500Z
DTEND;VALUE=DATE-TIME:20160928T143000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17579@indico.desy.de
DESCRIPTION:Speakers: Juraj Klarić (Technical University Munich)\nThe ext
ension of the Standard Model by heavy right-handed neutrinos can simultane
ously explain the observed neutrino masses via the seesaw mechanism and th
e baryon asymmetry of the Universe via leptogenesis. If the mass of the he
avy neutrinos is below the electroweak scale\, they may be found at LHCb\,
BELLE II\, the proposed SHiP experiment or a future high-energy collider.
In this mass range\, the baryon asymmetry is generated via CP-violating o
scillations of the heavy neutrinos during their production. We study the g
eneration of the baryon asymmetry of the Universe in this scenario from fi
rst principles of non-equilibrium quantum field theory\, including spectat
or processes and feedback effects. We eliminate several uncertainties from
previous calculations and find that the baryon asymmetry of the Universe
can be explained with larger heavy neutrino mixing angles\, increasing the
chance for an experimental discovery. For the limiting cases of fast and
strongly overdamped oscillations of right-handed neutrinos\, the generatio
n of the baryon asymmetry can be calculated analytically up to corrections
of order one.\n\nhttps://indico.desy.de/event/14795/contributions/17579/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17579/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Structure of Kaehler potential for D-term inflationary attractor m
odels
DTSTART;VALUE=DATE-TIME:20160929T145000Z
DTEND;VALUE=DATE-TIME:20160929T150500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17580@indico.desy.de
DESCRIPTION:Speakers: Ken'ichi Saikawa (DESY)\nMinimal chaotic models of D
-term inflation predicts too large primordial tensor perturbations. Althou
gh it can be made consistent with observations utilizing higher order term
s in the Kaehler potential\, expansion is not controlled in the absence of
symmetries. We comprehensively study the conditions of Kaehler potential
for D-term plateau-type potentials and discuss its symmetry. They include
the alpha-attractor model with a massive vector supermultiplet and its gen
eralization leading to pole inflation of arbitrary order. We extend the mo
dels so that it can describe Coulomb phase\, gauge anomaly is cancelled\,
and fields other than inflaton are stabilized during inflation. We also po
int out a generic issue for large-field D-term inflation that the masses o
f the non-inflaton fields tend to exceed the Planck scale.\n\nhttps://indi
co.desy.de/event/14795/contributions/17580/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17580/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Galactic sources: update information from gamma-rays experiments a
nd implications for IceCube
DTSTART;VALUE=DATE-TIME:20160928T143000Z
DTEND;VALUE=DATE-TIME:20160928T144500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17581@indico.desy.de
DESCRIPTION:Speakers: Viviana Niro (IFT UAM/CSIS and UAM)\nIn this talk\,
I'll show how updated information from gamma-rays experiments constrain th
e spectrum of the galactic sources previously detected by the Milagro coll
aboration. \nI'll show the number of through-going muons expected from the
se sources at the IceCube detector and I'll discuss the statistical signif
icance of each source as a function of the detector running time. \nMoreov
er\, I'll show also the constrains that could be set on the cut-off \nener
gy and spectral index of the Milagro sources.\n\nhttps://indico.desy.de/ev
ent/14795/contributions/17581/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17581/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Efficient calculation of cosmological neutrino clustering
DTSTART;VALUE=DATE-TIME:20160929T124500Z
DTEND;VALUE=DATE-TIME:20160929T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17582@indico.desy.de
DESCRIPTION:Speakers: Maria Archidiacono (RWTH Aachen University)\nWithin
the next few years cosmological structure formation will be probed in grea
ter detail than ever before by new and very large surveys\, most notably E
UCLID and LSST.\nWhile this opens great possibilities for probing for exam
ple dark energy and the mass of neutrinos\, it also puts very stringent re
quirements on theoretical calculations of cosmological observables\, such
as the matter power spectrum. In this regard\, the treatment of massive ne
utrinos is particularly challenging both in N-body simulations and in line
ar theory Boltzmann codes.\nIn this talk I will present a new approximatio
n to the third moment of the Boltzmann hierarchy and demonstrate that with
this new approximation the neutrino power spectrum can be calculated with
a precision of a few percent.\nThen I will discuss an extremely efficient
way of calculating the neutrino power spectrum in the regime of non-linea
r dark matter clustering: I will show that the derived neutrino power spec
trum is consistent with what can be calculated in real space using N-body
simulations.\n\nhttps://indico.desy.de/event/14795/contributions/17582/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17582/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mordell-Weil Torsion in the Mirror of Multi-Sections
DTSTART;VALUE=DATE-TIME:20160928T133500Z
DTEND;VALUE=DATE-TIME:20160928T135000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17583@indico.desy.de
DESCRIPTION:Speakers: Paul-Konstantin Oehlmann (DESY)\nWe give further evi
dence that genus-one fibers with multi-sections are mirror dual to fibers
with Mordell-Weil torsion. In the physics of F-theory compactifications th
is implies a relation between models with a non-simply connected gauge gro
up and those with discrete symmetries. We explicitly check this observatio
n for torus fibers in two and three dimensional ambient spaces whereas the
duality admits a combinatorial explanation for the first case. We comment
on several new features of these models\, such as self-dual fibers that r
ealize models with quotient and discrete symmetries at the same time.\n\nh
ttps://indico.desy.de/event/14795/contributions/17583/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17583/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Soft and Coulomb resummation for squark and gluino production at t
he LHC
DTSTART;VALUE=DATE-TIME:20160929T124000Z
DTEND;VALUE=DATE-TIME:20160929T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17584@indico.desy.de
DESCRIPTION:Speakers: Christian Schwinn (RWTH Aachen)\nI discuss the combi
ned resummation of soft and Coulomb-gluon effects for the production of he
avy coloured particles at NNLL accuracy\, which includes contributions fro
m spin-dependent non-relativistic potentials and so-called annihilation co
rrections. \nI present results for squark and gluino pair production\nat t
he LHC.\n\nhttps://indico.desy.de/event/14795/contributions/17584/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17584/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Top pair production with a jet with NLO QCD off-shell effects at t
he LHC
DTSTART;VALUE=DATE-TIME:20160929T142500Z
DTEND;VALUE=DATE-TIME:20160929T144500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17585@indico.desy.de
DESCRIPTION:Speakers: Manfred Kraus (RWTH Aachen University)\nTop quark ph
ysics is entering a precision era with the LHC Run II. A comprehensive stu
dy of top quark pair production in association with one hard jet in the di
-lepton decay channel is presented for a center-of-mass energy of 13 TeV.
The NLO QCD calculation takes into account all resonant and non-resonant a
nd interference contributions for off-shell top quarks\, and W and Z boson
s. Theoretical uncertainties are addressed through an independent variatio
n of the renormalization and factorization scales\, where fixed-valued and
dynamical scales have been investigated. In addition\, the uncertainties
induced by the parametrization of parton distribution functions have been
addressed. Finally\, a detailed comparison of the uncertainties for integr
ated and differential cross sections is presented.\n\nhttps://indico.desy.
de/event/14795/contributions/17585/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17585/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Classification of maximally supersymmetric backgrounds in supergra
vity theories
DTSTART;VALUE=DATE-TIME:20160928T132000Z
DTEND;VALUE=DATE-TIME:20160928T133500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17586@indico.desy.de
DESCRIPTION:Speakers: Severin Lüst (Universität Hamburg)\nWe study maxim
ally supersymmetric solutions of all gauged or deformed supergravity theor
ies in D≥3 space-time dimensions. For vanishing background fluxes the sp
ace-time background has to be either Minkowski or anti-de Sitter. We deriv
e a simple criterion for the existence of solutions with non-trivial fluxe
s and determine all supergravities that satisfy it. We show that their sol
utions coincide with those of the corresponding ungauged theories and conc
lude that the known list of maximally supersymmetric solutions is exhausti
ve.\n\nhttps://indico.desy.de/event/14795/contributions/17586/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17586/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Large-Charge Perturbation Theory
DTSTART;VALUE=DATE-TIME:20160929T120000Z
DTEND;VALUE=DATE-TIME:20160929T121500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17587@indico.desy.de
DESCRIPTION:Speakers: Orestis Loukas (University of Bern)\nI will introduc
e the basic concepts of Large-Charge Perturbation Theory (LCPT) in d+1 spa
ce-time dimensions.\nGiven a Quantum Field Theory with a globally conserve
d charge Q\, LCPT aims at providing analytic insight to sectors\, which re
main inaccessible via ordinary perturbative methods\, but where Q is assum
ed to be large.\nTo this end\, the scalar O(2) model with $\\phi^N$ self-i
nteraction will be implemented as a toy-example.\nI will construct the lar
ge-charge vacuum of this theory as a generalized coherent state and derive
its effective potential at fixed (and large) charge Q.\nSubsequently\, we
shall investigate the perturbative treatment of fluctuations around the l
arge-Q vacuum proving the existence of a consistent “1/Q-expansion”.\n
\nhttps://indico.desy.de/event/14795/contributions/17587/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17587/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shape dependence of holographic Rényi entropy in general dimensio
ns
DTSTART;VALUE=DATE-TIME:20160929T133000Z
DTEND;VALUE=DATE-TIME:20160929T134500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17588@indico.desy.de
DESCRIPTION:Speakers: Marco Meineri (EPFL)\nRényi entropies\, and entangl
ement entropy in particular\, are popular measures of entanglement in quan
tum theories. We present a holographic method for computing the respo
nse of Rényi entropies in conformal field theories to small shape deforma
tions around a flat (or spherical) entangling surface. Our strategy is bas
ed on general properties of conformal field theories in the presence of de
fects\, and can be applied to the study of other extended operators in hol
ographic CFTs. We present numerical and analytical results valid for the h
olographic duals of Einstein and Gauss-Bonnet gravity in various dimension
s.\n\nhttps://indico.desy.de/event/14795/contributions/17588/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17588/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Unifying inflation with the axion\, dark matter\, baryogenesis and
the seesaw mechanism
DTSTART;VALUE=DATE-TIME:20160929T120000Z
DTEND;VALUE=DATE-TIME:20160929T121500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17589@indico.desy.de
DESCRIPTION:Speakers: Guillermo Ballesteros (IPhT CEA - Saclay)\nI will de
scribe a minimal extension of the Standard Model of particle physics that
accounts for inflation\, dark matter\, baryogenesis\,\nthe smallness of ne
utrino masses and solves the strong CP problem\, with a new physics scale
around ~10^11 GeV.\n\nhttps://indico.desy.de/event/14795/contributions/175
89/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17589/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Crystalline Confined Phases in Lattice Gauge Theories
DTSTART;VALUE=DATE-TIME:20160929T122000Z
DTEND;VALUE=DATE-TIME:20160929T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17590@indico.desy.de
DESCRIPTION:Speakers: Debasish Banerjee (Deutsches Elektronen Synchrotron
DESY\, Zeuthen)\nIn the Wilson formulation\, lattice gauge theories with c
ompact gauge\ngroup are confining\, at least in the strong coupling limit.
In addition\, the ground state usually preserves discrete symmetries such
as translational and charge conjugation symmetry. In this talk\, we consi
der generalized lattice gauge theories: quantum link models and self-adjoi
nt extensions of Wilson-type theories in (2+1)-dimensions\, which in addit
ion to being confined\, also spontaneously break charge conjugation or lat
tice translation invariance\, thus giving rise to exotic crystalline confi
ned phases. Qualitatively new phenomena\, such as the fractionalization of
the fundamental flux unit\, can also be observed in these quantum link mo
dels\, and may be observable in quantum simulations using\, quantum circui
ts or ultracold atoms in an optical lattice.\n\nhttps://indico.desy.de/eve
nt/14795/contributions/17590/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17590/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rethinking Higgs mass stability bounds
DTSTART;VALUE=DATE-TIME:20160929T120000Z
DTEND;VALUE=DATE-TIME:20160929T122000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17591@indico.desy.de
DESCRIPTION:Speakers: René Sondenheimer (TPI FSU Jena)\nWe investigate no
nperturbative renormalization group flows of various Higgs-Yukawa models
mimicking the Higgs sector of the standard model. We reanalyze the convent
ional arguments that relate a lower bound for the Higgs mass with vacuum s
tability in the framework of the functional renormalization group as well
as in the light of exact results for the regularized fermion determinant.
In both cases\, we find no indication for vacuum instability nor metastabi
lity induced by top fluctuations if the cutoff is kept finite but arbitrar
y for standard bare actions which are perturbatively renormalizable.\nFor
the class of standard bare potentials of quartic type at a given ultraviol
et cutoff scale\, we show that a finite infrared Higgs mass range emerges
naturally from the RG flow itself. Higgs masses outside the resulting boun
ds cannot be connected to any conceivable set of bare parameters in this s
tandard model quartic class. A lower bound for the Higgs mass arises from
the requirement of a well-defined partition function\, i.e.\, stability of
the bare potential. This consistency bound can\, however\, be relaxed con
siderably by more general forms of the bare potential without necessarily
introducing new metastable minima. We identify a simple renormalization gr
oup mechanism for this diminishing of the lower bound. Thus\, Higgs masses
smaller than the conventional infrared window do not necessarily require
new physics at low scales or give rise to instability problems.\n\nhttps:/
/indico.desy.de/event/14795/contributions/17591/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17591/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Conformal symmetry breaking and evolution equations in Quantum Chr
omodynamics
DTSTART;VALUE=DATE-TIME:20160929T120000Z
DTEND;VALUE=DATE-TIME:20160929T122000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17592@indico.desy.de
DESCRIPTION:Speakers: Matthias Strohmaier (University of Regensburg\, Theo
retical Particle Physics Department)\nQuantum Chromodynamics (QCD) in non-
integer d = 4 − 2e space-time dimensions possesses a nontrivial critical
point where the theory enjoys exact scale and conformal invariance. As co
nsequence there are three symmetry generators that commute with the renorm
alization group equation for composite operators.\nThe resulting constrain
ts allow to reconstruct full evolution kernels in physical (integer) dimen
sions from their eigenvalues (anomalous dimensions) and the calculation of
the conformal anomaly at one order less in a perturbative expansion.\n\nW
e use this technique to derive three-loop\, i.e. NNLO\, evolution equation
s for flavor-nonsinglet quark-antiquark light-ray operators that encode th
e scale dependence of generalized hadron parton distributions and light-co
ne distribution amplitudes in the most compact form. In particular we calc
ulate the two-loop correction to the generator of special conformal transf
ormations at the critical\npoint in the modified theory that corresponds t
o the two-loop conformal anomaly in the physical theory. Using this result
we fix the off-diagonal part of the evolution kernel at NNLO.\n\nhttps://
indico.desy.de/event/14795/contributions/17592/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17592/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Distinguishing Dirac and Majorana Sterile Neutrinos at LHC
DTSTART;VALUE=DATE-TIME:20160928T124000Z
DTEND;VALUE=DATE-TIME:20160928T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17593@indico.desy.de
DESCRIPTION:Speakers: Kechen Wang (DESY)\nhttps://indico.desy.de/event/147
95/contributions/17593/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17593/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A comprehensive approach to dark matter studies: exploration of si
mplified top-philic models
DTSTART;VALUE=DATE-TIME:20160928T122000Z
DTEND;VALUE=DATE-TIME:20160928T124000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17594@indico.desy.de
DESCRIPTION:Speakers: Jan Heisig (RWTH Aachen University)\nhttps://indico.
desy.de/event/14795/contributions/17594/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17594/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Multicomponent WIMP Dark Matter from gauge symmetries
DTSTART;VALUE=DATE-TIME:20160928T133000Z
DTEND;VALUE=DATE-TIME:20160928T134500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17595@indico.desy.de
DESCRIPTION:Speakers: Christian Gross (Helsinki University)\nSimple single
component WIMP Dark Matter (DM) models are under pressure from direct det
ection (DD). This is related to the relation between annihilation- and DD
cross-section in such models. By contrast\, multicomponent WIMP DM models
leave open a large part of the parameter space and allow for a very rich p
henomenology. We study these issues using the example of a UV complete fra
mework containing both scalar and vector WIMPs. This model arises from hid
den gauge symmetries\, connected to the Standard model with a Higgs portal
.\n\nhttps://indico.desy.de/event/14795/contributions/17595/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17595/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exceptional F(4) Higher-Spin Theory in AdS(6) at One-Loop and othe
r Tests of Duality
DTSTART;VALUE=DATE-TIME:20160928T120000Z
DTEND;VALUE=DATE-TIME:20160928T122000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17596@indico.desy.de
DESCRIPTION:Speakers: Evgeny Skvortsov ()\nWe study the higher-spin gauge
theory in six-dimensional anti-de Sitter space AdS6 that is based on the e
xceptional Lie superalgebra F(4). The relevant higher-spin algebra was con
structed in arXiv:1409.2185 [hep-th]. We determine the spectrum of the the
ory and show that it contains the physical fields of the Romans F(4) gauge
d supergravity. The full spectrum consists of an infinite tower of unitary
supermultiplets of F(4) which extend the Romans multiplet to higher spins
plus a single short supermultiplet.\nMotivated by applications to this no
vel supersymmetric higher-spin theory as well as to other theories\, we ex
tend the known one-loop tests of AdS/CFT duality in various directions. Th
e spectral zeta-function is derived for the most general case of fermionic
and mixed-symmetry fields\, which allows one to test the Type-A and B the
ories and supersymmetric extensions thereof in any dimension. We also stud
y higher-spin doubletons and partially-massless fields. While most of the
tests are successfully passed\, the Type-B theory in all even dimensional
anti-de Sitter spacetimes presents an interesting puzzle: the free energy
as computed from the bulk is not equal to that of the free fermion on the
CFT side\, though there is some systematics to the discrepancy.\n\nhttps:/
/indico.desy.de/event/14795/contributions/17596/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17596/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A stable vacuum: why we found no SUSY
DTSTART;VALUE=DATE-TIME:20160929T121500Z
DTEND;VALUE=DATE-TIME:20160929T123000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17597@indico.desy.de
DESCRIPTION:Speakers: Wolfgang Gregor Hollik (DESY)\nThe discovery of the
Higgs boson puts a severe constraint on the available parameter space in a
ny SUSY model. In the MSSM\, a 125 GeV Higgs together with relatively ligh
t stops needs a very large stop mixing\, therefore large trilinear terms i
n the scalar potential. Those are known to destabilize the electroweak gro
und state and induce a true vacuum in association with squark vevs. Previo
us analyses of vacuum stability in the MSSM usually follow rather arbitrar
y constraints in the field space configuration. Relaxing the bounds on fie
ld alignment\, we find distinct excluded regions and constrain the allowed
parameters even further by imposing the correct light Higgs mass. As resu
lt\, generically squark masses in the multi TeV regime are needed to avoid
an unstable vacuum - a result with agrees with the observation of no hint
s of SUSY so far.\n\nhttps://indico.desy.de/event/14795/contributions/1759
7/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17597/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Differential Higgs Boson Pair Production at NNLO in QCD
DTSTART;VALUE=DATE-TIME:20160928T120000Z
DTEND;VALUE=DATE-TIME:20160928T122000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17598@indico.desy.de
DESCRIPTION:Speakers: Jonas Lindert (Zurich University)\nhttps://indico.de
sy.de/event/14795/contributions/17598/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17598/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Higgs boson as a five-dimensional gauge field
DTSTART;VALUE=DATE-TIME:20160928T130000Z
DTEND;VALUE=DATE-TIME:20160928T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17599@indico.desy.de
DESCRIPTION:Speakers: Francesco Knechtli (Univ. Wuppertal)\nWe present a n
on-perturbative study of a five-dimensional Gauge-Higgs Unification model
on the lattice using Monte Carlo simulations.\nWe find a region in the Hig
gs phase where the ratio of the Higgs to the gauge boson mass is like in t
he Standard Model. In the same region we observe localization to four dime
nsions. Despite the non existence of a second order phase transition\, cut
-off effects are found to be small allowing a prediction of the energy of
excited states.\n\nhttps://indico.desy.de/event/14795/contributions/17599/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17599/
END:VEVENT
BEGIN:VEVENT
SUMMARY:LHC Benchmark Scenarios for the Real Higgs Singlet Extension of th
e Standard Model
DTSTART;VALUE=DATE-TIME:20160928T132000Z
DTEND;VALUE=DATE-TIME:20160928T134000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17600@indico.desy.de
DESCRIPTION:Speakers: Tania Robens (TU Dresden)\nhttps://indico.desy.de/ev
ent/14795/contributions/17600/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17600/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tackling differential distributions for Higgs production at higher
orders
DTSTART;VALUE=DATE-TIME:20160928T124000Z
DTEND;VALUE=DATE-TIME:20160928T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17601@indico.desy.de
DESCRIPTION:Speakers: Simone Lionetti (ETH Zurich)\nhttps://indico.desy.de
/event/14795/contributions/17601/
LOCATION:DESY Hamburg Seminar room 4b
URL:https://indico.desy.de/event/14795/contributions/17601/
END:VEVENT
BEGIN:VEVENT
SUMMARY:N=3 four dimensional field theories
DTSTART;VALUE=DATE-TIME:20160928T145500Z
DTEND;VALUE=DATE-TIME:20160928T151500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17602@indico.desy.de
DESCRIPTION:Speakers: Diego Regalado (MPP Munich)\nI will describe a class
of four dimensional field theories constructed by quotienting ordinary N=
4 U(N) SYM by particular combinations of R-symmetry and SL(2\,Z) automorph
isms. These theories appear naturally on the worldvolume of D3 branes prob
ing terminal singularities in F-theory\, where they can be thought of as n
on-perturbative generalizations of the O3 plane. I will focus on cases pre
serving only 12 supercharges\, where the quotient gives rise to theories w
ith coupling fixed at a value of order one. These constructions possess an
unconventional large N limit described by a non-trivial F-theory fibratio
n with base AdS5×(S5/Zk). Upon reduction on a circle the N=3 theories flo
w to N=6 ABJM theories.\n\nhttps://indico.desy.de/event/14795/contribution
s/17602/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17602/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CHY in Collinear Limit
DTSTART;VALUE=DATE-TIME:20160929T121500Z
DTEND;VALUE=DATE-TIME:20160929T123000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17603@indico.desy.de
DESCRIPTION:Speakers: Wadim Wormsbecher (Hu Berlin)\nWe investigate the co
llinear behavior of tree level amplitudes in several theories using their
CHY (Cachazo-He-Yuan) representation. We obtain the leading and subleading
orders of the adjacent collinear limit and ask the question whether unive
rsality is present and how Einstein-Yang-Mills amplitudes emerge by checki
ng specific identities due to Stieberger and Taylor.\n\nhttps://indico.des
y.de/event/14795/contributions/17603/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17603/
END:VEVENT
BEGIN:VEVENT
SUMMARY:keV Sterile Neutrinos as Dark Matter
DTSTART;VALUE=DATE-TIME:20160928T120000Z
DTEND;VALUE=DATE-TIME:20160928T121500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17604@indico.desy.de
DESCRIPTION:Speakers: Alexander Merle (Max-Planck-Institut für Physik)\nI
n the absence of a clear WIMP signal\, we should think about alternative c
andidates for Dark Matter. A very well motivated example is a (up to now h
ypothetical) sterile neutrino with a mass of a few keV. In this talk\, I w
ill give an overview over the topic of keV sterile neutrino Dark Matter\,
with a particular focus on Dark Matter production in the early Universe an
d on phenomenological considerations. While WIMPs are not dead yet\, they
have to learn how to live in the neighbourhood of serious competitors.\n\n
https://indico.desy.de/event/14795/contributions/17604/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17604/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Three-jet production in electron-positron annihilation with the Co
lorFulNNLO method
DTSTART;VALUE=DATE-TIME:20160928T141500Z
DTEND;VALUE=DATE-TIME:20160928T143500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17605@indico.desy.de
DESCRIPTION:Speakers: Adam Kardos (University of Debrecen)\nIn my talk I i
ntroduce the ColorFulNNLO method to calculate NNLO QCD\ncorrections to any
IR-safe observable in the case of three-jet production\nin electron-posit
ron annihilation. Provided the ColorFulNNLO method is\ngeneral it was impl
emented in a computer code called MCCSM (Monte Carlo\nfor the ColorFulNNLO
Subtraction Method). The capabilities of the code are\ndemonstrated by ca
lculating standard event shape variables and comparing\nthem to literature
and providing\, for the first time\, NNLO QCD correction \nto energy-ener
gy correlation\, oblateness and jet cone energy fraction.\n\nhttps://indic
o.desy.de/event/14795/contributions/17605/
LOCATION:DESY Hamburg Seminar room 4a/b
URL:https://indico.desy.de/event/14795/contributions/17605/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Relic density at NLO: the IR finiteness
DTSTART;VALUE=DATE-TIME:20160928T130000Z
DTEND;VALUE=DATE-TIME:20160928T131500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17606@indico.desy.de
DESCRIPTION:Speakers: Andrzej Hryczuk (University of Oslo)\nIn recent year
s there has been an increasing interest in computations of the dark matter
thermal relic density beyond the leading order in perturbation theory. In
this talk we point out that the standard calculation\, based on solving t
he Boltzmann equations\, at NLO suffers from a temperature-dependent IR di
vergence. In an example model we show how both soft and collinear temperat
ure-dependent divergences cancel when the collision term is instead comput
ed in the thermal field theory formalism. We also discuss the remaining fi
nite temperature-dependent correction and its interpretation within the EF
T framework.\n\nhttps://indico.desy.de/event/14795/contributions/17606/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17606/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rethinking baryon number conservation by black holes
DTSTART;VALUE=DATE-TIME:20160929T143500Z
DTEND;VALUE=DATE-TIME:20160929T145000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17607@indico.desy.de
DESCRIPTION:Speakers: Alexander Gussmann (Arnold-Sommerfeld-Center\, LMU M
unich)\nStandard folk-theorem arguments claim that global charges\, such a
s baryon number\, cannot be conserved by semiclassical black holes. We arg
ue that the existence of black holes with classical skyrmion hair invalida
tes these standard arguments. By carefully analyzing the standard argument
s based on a Gedankenexperiment in which a black hole\nis seemingly-unable
to return the baryon number that it swallowed\, we identify inc
onsistencies in this reasoning\, which does not take into the account nei
ther the existence of skyrmion black holes nor the baryon/skyrmion corresp
ondence. Using a refined Gedankenexperiment\, we argue that one should ret
hink the option of baryon number conservation by semiclassical black holes
and provide arguments in favor of baryon number conservation. If a black
hole cannot destroy baryon number\, this can have important phenomenologic
al consequences.\n\nhttps://indico.desy.de/event/14795/contributions/17607
/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17607/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scale-invariant models of inflation: a geometrical interpretation
DTSTART;VALUE=DATE-TIME:20160929T140500Z
DTEND;VALUE=DATE-TIME:20160929T142000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17608@indico.desy.de
DESCRIPTION:Speakers: Javier Rubio (ITP Heidelberg)\nI will describe how t
he geometrical properties of the target manifold affect the inflationary
predictions of two-field scalar-tensor theories invariant under dilatation
s. The results presented extend the predictions of the Higgs-dilaton model
to a full class of theories defined by an underlying principle. In partic
ular\, I will show that when the field-derivative space in the Einstein fr
ame is maximally symmetric during inflation\, the inflationary predictions
\nare universal and independent of the details of the theory.\n\nhttps://
indico.desy.de/event/14795/contributions/17608/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17608/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum moduli spaces and quantum algebras
DTSTART;VALUE=DATE-TIME:20160928T071000Z
DTEND;VALUE=DATE-TIME:20160928T074000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17609@indico.desy.de
DESCRIPTION:Speakers: Vasily Pestun ()\nI will review the gauge theoretica
l construction of quantum algebras such as q-deformed W-algebras and quant
um groups from the geometry of the moduli space of quiver instantons\, mod
uli space of monopoles and moduli space of vacua of N=2 supersymmetric gau
ge theories.\n\nhttps://indico.desy.de/event/14795/contributions/17609/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17609/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Model-independent approach to gamma-ray spectral features in dark
matter indirect searches
DTSTART;VALUE=DATE-TIME:20160928T124500Z
DTEND;VALUE=DATE-TIME:20160928T130000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17610@indico.desy.de
DESCRIPTION:Speakers: Camilo Alfredo Garcia Cely (ULB)\nThe observation of
line-like signals of high-energy gamma rays is considered a discovery cha
nnel of dark matter. \nNevertheless\, calculating the rate and the spectra
l shape associated to these processes is highly non-trivial and depends o
n the details of the underlying dark matter model.\nI will argue that\, in
spite of this situation\, there are a number of model-independent stateme
nts that can be drawn. \nFirst\, I will show that angular momentum conside
rations determine to a large extend the spectral features arising in dark
matter annihilations into intermediary particles which subsequently produ
ce photons via two-body decays. I illustrate this with the gamma-ray spect
ra generated by dark matter annihilating into hypothetical diphoton resona
nces. \nIf time allows\, I will then discuss a systematic classification
of the one-loop diagrams leading to dark matter annihilations into photon
lines in an arbitrary model. I will argue that such classification can be
used to greatly simplify the calculation of the corresponding cross sectio
ns.\n\nhttps://indico.desy.de/event/14795/contributions/17610/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17610/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exploring the stop-bino coannihilation region with sbottom decays
DTSTART;VALUE=DATE-TIME:20160929T130000Z
DTEND;VALUE=DATE-TIME:20160929T132000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17611@indico.desy.de
DESCRIPTION:Speakers: Jiayin Gu (DESY)\nA light stop with mass almost dege
nerate with the lightest neutralino has important implications on naturaln
ess and dark matter relic abundance\, and is hard to search at colliders.
In this paper\, we study the potential of searching for such stop particl
es at the LHC from sbottom decays\, focusing on two channels with final st
ates 2l+met and 1b1l+met. We found that\, if the lightest sbottom has ma
ss around or below 1 TeV and has a significant branching ratio to decay to
stop and W\, which are favored by naturalness and Higgs mass\, a stop alm
ost degenerate with neutralino can be excluded up to about 500--600 GeV at
the 13 TeV LHC with 300 fb^-1 data. The searches we propose are compleme
ntary to other SUSY searches at the LHC and could have the best sensitivit
y to the stop-bino coannihilation region. They can also be easily impleme
nted in the existing searches at the LHC.\n\nhttps://indico.desy.de/event/
14795/contributions/17611/
LOCATION:DESY Hamburg Seminar room 4a
URL:https://indico.desy.de/event/14795/contributions/17611/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A halo independent comparison of direct dark matter searches
DTSTART;VALUE=DATE-TIME:20160928T131500Z
DTEND;VALUE=DATE-TIME:20160928T133000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17612@indico.desy.de
DESCRIPTION:Speakers: Andreas Rappelt (Technische Universität München)\n
In this work\, we develop a method to compare results from various direct
detection experiments without making assumptions on the velocity distribut
ion of the dark matter particles in the Solar System. Furthermore\, we con
sider the particular case when one of the experiments reports a positive s
ignal\, and we apply our method to investigate the compatibility of the DA
MA claim with the null searches from other experiments.\n\nhttps://indico.
desy.de/event/14795/contributions/17612/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17612/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Comments on families of N=2 SCFTs
DTSTART;VALUE=DATE-TIME:20160928T083000Z
DTEND;VALUE=DATE-TIME:20160928T090000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17613@indico.desy.de
DESCRIPTION:Speakers: Kyriakos Papadodimas ()\nI will review some exact re
sults about the coupling constant dependence of the chiral ring in four di
mensional N=2 theories.\n\nhttps://indico.desy.de/event/14795/contribution
s/17613/
LOCATION:DESY Hamburg Main Auditorium
URL:https://indico.desy.de/event/14795/contributions/17613/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Minkowski 3-forms and Axion Monodromy in String Theory
DTSTART;VALUE=DATE-TIME:20160928T141500Z
DTEND;VALUE=DATE-TIME:20160928T143500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17621@indico.desy.de
DESCRIPTION:Speakers: Irene Valenzuela (MPI\, Munich)\nAxion monodromy is
a promising proposal to achieve a transplanckian field range for an axion
in string theory. These models are better described in terms of a Minkowsk
i 3-form field which couples linearly to the axion\, in the Kaloper-Sorbo
fashion. We highlight the differences between this simple effective theory
and the structure actually obtained from string theory. We show that all
the RR and NS axion dependence of the flux Type II scalar potential appear
s through the said 3-forms. However\, the presence of multiple 3-forms and
the mixing with other (non-axionic) moduli makes necessary to revisit the
arguments regarding perturbative control and backreaction\, which indeed
might reduce the effective field range. We also show the constraints on th
e field range coming from the Weak Gravity Conjecture when applied to thes
e 3-forms\, and the implications for large field inflation and the relaxio
n proposal to the EW hierarchy problem.\n\nhttps://indico.desy.de/event/14
795/contributions/17621/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17621/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Schroedinger method as field theoretical model to describe str
ucture formation
DTSTART;VALUE=DATE-TIME:20160929T130000Z
DTEND;VALUE=DATE-TIME:20160929T131500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17614@indico.desy.de
DESCRIPTION:Speakers: Cora Uhlemann (Utrecht University)\nWe investigate t
he formation of a dark matter halo using an idea that is rooted in the cor
respondence between phase space distributions in classical and quantum mec
hanics. The dynamics of cold dark matter is governed by the Vlasov (or co
llisionless Boltzmann) equation whose nonlinearity is induced by gravity a
ccording to the Poisson equation. Determining the evolution of density and
velocity demands solving a coupled hierarchy for the cumulants of the dis
tribution function In the presence of long-range interaction\, no consiste
nt truncation is known apart from the pressureless fluid model which is in
capable of describing halo formation due to the inability to generate high
er cumulants dynamically. We introduce the Schrödinger method where dark
matter is modeled as self-gravitating scalar field solving the Schröding
er-Poisson equation. Using the phase space formulation of quantum mechanic
s\, we construct a distribution function that approximately solves the Vla
sov-Poisson equation without truncation. We demonstrate that the Schrödin
ger method is capable of emulating the dynamics of halo formation while co
ntaining only two degrees of freedom\, just like the pressureless fluid mo
del. Based on this\, we discuss how the Schrödinger method can guide furt
her modeling based on solutions with finitely generated rather than finite
ly many cumulants.\n\nhttps://indico.desy.de/event/14795/contributions/176
14/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17614/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Light from Dark (Matter) via Multi-Wavelength Synergies
DTSTART;VALUE=DATE-TIME:20160928T123000Z
DTEND;VALUE=DATE-TIME:20160928T124500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17615@indico.desy.de
DESCRIPTION:Speakers: Stefano Stefano Camera (Jodrell Bank Centre for Astr
ophysics\, The University of Manchester)\nA tremendous experimental effort
is underway with the goal of delivering the first non- gravitational dete
ction of dark matter (DM). Indeed\, despite its huge abundance\, very lit
tle is known about the true nature of DM\, and the community is eager for
new and innovative ideas able to finally pin down its properties. In this
talk\, I shall review how cross-correlations of astrophysical and cosmolo
gical observables have the real potential of detecting electromagnetic sig
nals from annihilating/decaying DM particles. This is done by exploiting
multi-wavelength synergies between gamma-ray experiments and optical/near-
IR cosmological surveys\, thanks to which we can disentangle the feeble ga
mma-ray signal expected from particle DM interactions from the overwhelmin
g astrophysical background of unresolved gamma-ray sources. After having
set the scene\, I shall also present recent observational results.\n\nhttp
s://indico.desy.de/event/14795/contributions/17615/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17615/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Perspectives for tests of neutrino mass generation at the GeV scal
e: Experimental reach versus theoretical predictions
DTSTART;VALUE=DATE-TIME:20160928T150000Z
DTEND;VALUE=DATE-TIME:20160928T151500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17616@indico.desy.de
DESCRIPTION:Speakers: Rasmus Rasmussen (DESY)\nIt has been shown that heav
y neutral leptons (HNLs) can explain many phenomena seen in Nature such as
the neutrino oscillation data\, dark matter and the baryon asymmetry. The
refore\, alot of theoretical and experimental effort has been put into thi
s subject. I will discuss the parameter space reach of future experiments
searching for HNLs at the GeV scale in terms of neutrino mass models with
three HNL generations. I will focus on two classes of models: Generic assu
mptions and flavor symmetry-generated models.\n\nhttps://indico.desy.de/ev
ent/14795/contributions/17616/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17616/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Green-Schwarz superstring on the lattice
DTSTART;VALUE=DATE-TIME:20160929T144500Z
DTEND;VALUE=DATE-TIME:20160929T150000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17617@indico.desy.de
DESCRIPTION:Speakers: Lorenzo Bianchi (Hamburg University)\nWe consider po
ssible discretizations for a gauge-fixed Green-Schwarz action of Type IIB
superstring. We use them for measuring the action\, from which we extract
the cusp anomalous dimension of planar N=4 SYM as derived from AdS/CFT\, a
s well as the mass of the two AdS excitations transverse to the relevant n
ull cusp classical string solution. For both the observables\, we find a g
ood agreement for large g\, which is the perturbative regime of the sigma-
model. For smaller values of g\, the expectation value of the action exhib
its a deviation compatible with the presence of quadratic divergences. Aft
er their non-perturbative subtraction the continuum limit can be taken\, a
nd suggests a qualitative agreement with the non-perturbative expectation
from AdS/CFT.\n\nhttps://indico.desy.de/event/14795/contributions/17617/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17617/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Flavor Cosmology: Dynamical Yukawas in the Froggatt-Nielsen Mechan
ism
DTSTART;VALUE=DATE-TIME:20160928T144500Z
DTEND;VALUE=DATE-TIME:20160928T150000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17618@indico.desy.de
DESCRIPTION:Speakers: Iason Baldes (DESY)\nIf the Standard Model Yukawa co
uplings varied in the early universe and started with order one values bef
ore electroweak symmetry breaking\, the CP violation associated with the C
KM matrix could be the origin of the matter-antimatter asymmetry. The larg
e effective Yukawa couplings which lead to the enhanced CP violation can a
lso help in achieving a strong first-order electroweak phase transition. I
n this talk\, I will discuss the implementation of dynamical Yukawa coupli
ngs in the context of the Froggatt--Nielsen mechanism.\n\nhttps://indico.d
esy.de/event/14795/contributions/17618/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17618/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Black holes in the lab
DTSTART;VALUE=DATE-TIME:20160929T142000Z
DTEND;VALUE=DATE-TIME:20160929T143500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17619@indico.desy.de
DESCRIPTION:Speakers: Nico Wintergerst (Stockholm University)\nBlack holes
possess a wide range of rather peculiar properties\, many of them in conn
ection with their ability to process\, store and release information. I ex
plore the possibility that the physical origin of these properties is quan
tum criticality. To this end\, I will demonstrate that simple Bose condens
ates exhibit a plethora of black hole like properties. This includes trapp
ing\, baldness\, evaporation\, entropy\, scrambling and the breakdown of s
emiclassical physics and allows for the exciting possibility to test black
hole information processing in labs. It can also serve as a powerful guid
eline to a quantum field theoretical understanding of black holes.\n\nhttp
s://indico.desy.de/event/14795/contributions/17619/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17619/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rigid Superconformal Field Theories in three dimensions
DTSTART;VALUE=DATE-TIME:20160928T151500Z
DTEND;VALUE=DATE-TIME:20160928T153000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17620@indico.desy.de
DESCRIPTION:Speakers: Aswin Balasubramanian (DESY and Univ of Hamburg)\nI'
ll talk about my work with J. Distler (to appear) in which we study a clas
s of 3d N=4 superconformal field theories and their mass deformations. We
perform this study by establishing a relation between the geometry of the
vacuum moduli spaces of these theories and (a refined version of) the ``Th
eory of sheets" which is an important subject in Geometric Representation
Theory. This realizes in a precise way an earlier proposal of Chacaltana-
Distler-Tachikawa about such a relationship. These three dimensional theo
ries are related to the codimension two (or four dimensional) defects of t
he six dimensional (0\,2) theory of type A\,D\,E (sometimes called theory
X[j]) by dimensional reduction. Understanding the mass deformations of the
se three dimensional theories is the first step in understanding the mass
deformations of a general class S theory. One of the surprises that arise
in our study is the existence of Rigid N=4 SCFTs in three dimensions. Thes
e are non-trivial SCFTs that do not admit an ordinary mass deformation. I'
ll describe the Coulomb and Higgs branches of Rigid SCFTs and the implicat
ions of their existence for the study of mass deformations.\n\nhttps://ind
ico.desy.de/event/14795/contributions/17620/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17620/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Metastability\, Chaotic Inflation\, and Primordial Black Holes
DTSTART;VALUE=DATE-TIME:20160929T123000Z
DTEND;VALUE=DATE-TIME:20160929T124500Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17622@indico.desy.de
DESCRIPTION:Speakers: Kyohei Mukaida (Kavli IPMU)\nWe revisit the compatib
ility between chaotic inflation\, which provides a natural solution to the
initial condition problem\, and the metastable electroweak vacuum\, which
is suggested by the results of the LHC and the current mass measurements
of top quark and Higgs boson. It is known that chaotic inflation poses a t
hreat to the stability of the electroweak vacuum because it easily generat
es large Higgs fluctuations during inflation or preheating and triggers th
e catastrophic vacuum decay. In this talk\, we would like to explain a sim
ple cosmological solution in which the vacuum is stabilized during chaotic
inflation\, preheating and afterwards. This simple solution naturally pre
dicts formation of primordial black holes. We find interesting parameter r
egions where the present dark matter density is provided by them. Gravitat
ional waves could be used as an interesting probe. Also\, the thermal lept
ogensis can be accommodated in our scenario.\n\nhttps://indico.desy.de/eve
nt/14795/contributions/17622/
LOCATION:DESY Hamburg Seminar room 2
URL:https://indico.desy.de/event/14795/contributions/17622/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Beyond complex Langevin equations
DTSTART;VALUE=DATE-TIME:20160929T150000Z
DTEND;VALUE=DATE-TIME:20160929T152000Z
DTSTAMP;VALUE=DATE-TIME:20201201T064445Z
UID:indico-contribution-14795-17623@indico.desy.de
DESCRIPTION:Speakers: Jacek Wosiek (Jagellonian University)\nA positive re
presentation for an arbitrary complex\, gaussian weight is derived and use
d to construct a statistical formulation of gaussian path integrals direct
ly in the Minkowski time. The positivity of Minkowski weights is achieved
by doubling the number of real variables. The continuum limit of the new r
epresentation exists only if some of the additional couplings tend to infi
nity and are tuned in a specific way. The construction is then successfull
y applied to three quantum mechanical examples including a particle in a c
onstant magnetic field -- a simplest prototype of a Wilson line. Further g
eneralizations are shortly discussed and an intriguing interpretation of n
ew variables is alluded to.\n\nhttps://indico.desy.de/event/14795/contribu
tions/17623/
LOCATION:DESY Hamburg Seminar room 1
URL:https://indico.desy.de/event/14795/contributions/17623/
END:VEVENT
END:VCALENDAR