Conveners
Parallel Session 1: Particle Phenomenology: Flavor Physics
- Thomas Mannel (Siegen University)
Parallel Session 1: Particle Phenomenology: Radiative Corrections
- Thorsten Ohl (University of Wuerzburg)
Parallel Session 1: Particle Phenomenology: Radiative Corrections
- Thorsten Ohl (University of Wuerzburg)
Parallel Session 1: Particle Phenomenology: Flavor Physics
- Thomas Mannel (Siegen University)
Parallel Session 1: Particle Phenomenology: Supersymmetry
- Thomas Mannel (Siegen University)
Parallel Session 1: Particle Phenomenology: Collider Physics, Higgs etc.
- Thorsten Ohl (University of Wuerzburg)
Parallel Session 1: Particle Phenomenology: Supersymmetry
- Thomas Mannel (Siegen University)
Parallel Session 1: Particle Phenomenology: Collider Physics, Higgs etc.
- Thorsten Ohl (University of Wuerzburg)
Parallel Session 1: Particle Phenomenology: Collider Physics, Higgs etc.
- Thorsten Ohl (University of Wuerzburg)
Parallel Session 1: Particle Phenomenology: Supersymmetry
- Thomas Mannel (Siegen University)
Tom Zirke
(University of Wuppertal)
26/09/2012, 14:00
The associated production of a Higgs boson and one of the weak gauge bosons W or Z at hadron colliders can be understood mainly as the Drell-Yan production of a virtual vector boson, which subsequently radiates a Higgs. QCD corrections affect only the Drell-Yan part and are known through NNLO (alpha_S^2), leading to a small remaining dependence on the renormalization and factorization scale...
Christian Hambrock
(TU Dortmund)
26/09/2012, 14:00
Form factors for hadronic transitions are a leading error source in the theoretical estimate of observables whose experimental measurements might eventually uncover BSM physics.
Two theoretical approaches, depending on the kinematic region, for the determination of hadronic form factors are available, namely LCSR and Lattice QCD.
We extract ratios of $B \to K^*$ form factors at low...
Dr
Christian Gross
(Uni Basel)
26/09/2012, 14:20
Recent experimental and theoretical progress regarding B --> K^(*) l^+ l^− decays led to improved bounds on the Wilson coefficients C_9 and C_10 of four-fermion operators of the |∆B| = |∆S| = 1 effective Hamiltonian. We analyze the resulting implications on squark flavor violation in the MSSM and obtain new constraints on flavor-changing left-right mixing in the up-squark-sector. We find the...
Mr
Tobias Neumann
(Bergische Universität Wuppertal)
26/09/2012, 14:20
Effects from a finite top quark mass on differential distributions in the Higgs+jet production cross section through gluon fusion are studied at next-to-leading order in the strong coupling, i.e. O(αs^4). Terms formally subleading in 1/mTop are calculated, and their influence on the transverse momentum and rapidity distribution of the Higgs boson are evaluated. We find that, for the...
Dr
Luca Di Luzio
(Karlsruhe Institute of Technology)
26/09/2012, 14:40
We study the extension of the MFV hypothesis to the MSSM without R-parity. The novelty of our approach lies in the observation that supersymmetry enhances the global symmetry of the kinetic term and in the fact that we consider as irreducible sources of flavor breaking all the couplings of the superpotential, including the R-parity violating ones. When R-parity violation is responsible for...
Dr
Aoife Bharucha
(Uni Hamburg)
26/09/2012, 14:40
We evaluate two-body decay modes of neutralinos in the Minimal Supersymmetric Standard Model with complex parameters (cMSSM). Assuming heavy scalar quarks we take into account all two-body decay channels involving charginos, neutralinos, (scalar) leptons, Higgs bosons and Standard Model gauge bosons. The evaluation of the decay widths is based on a full one-loop calculation including hard and...
Mr
Vinzenz Maurer
(Universität Basel)
26/09/2012, 15:00
The recent observations of the leptonic mixing angle \theta^PMNS_13 are consistent with \theta^PMNS_13 = \theta_C / \sqrt2 (with \theta_C being the Cabibbo angle \theta^CKM_12). We discuss how this relation can emerge in Grand Unified Theories (GUTs) via charged lepton corrections. The key ingredient is that in GUTs the down-type quark Yukawa matrix and the charged lepton Yukawa matrix are...
Julia Harz
(DESY Hamburg)
26/09/2012, 15:00
A powerful method to constrain the parameter space of theories beyond the Standard Model is to compare the predicted dark matter relic density with data from cosmological precision measurements, in particular from the WMAP and in future also from the PLANCK satellite.
On the particle physics side, the main uncertainty in the relic density calculation arises from the (co-)annihilation cross...
Mr
Stefan Schacht
(TU Dortmund)
26/09/2012, 15:50
New Physics patterns of D decays to two pseudoscalars are studied in the framework of SU(3) flavor symmetry including breaking effects.
Dr
Christian Schwinn
(Freiburg University)
26/09/2012, 15:50
Results for the top-pair production cross section at the Tevtron and the LHC will be presented, including a combined resummation of threshold logarithms and Coulomb corrections at NNLL accuracy.
The remaining theoretical and PDF uncertainties and prospects for the measurement of the top mass from the total cross section will be discussed.
Dr
Piotr Korcyl
(NIC DESY Zeuthen)
26/09/2012, 16:10
We present a one-loop order lattice perturbation theory calculation of a subset of Heavy Quark Effective Theory parameters.
HQET being an effective theory is defined through a set of parameters which should be fixed in a process called matching, order by order in 1/m.
We consider 6 matching conditions which are needed for the determination of, for example, the f_B decay constant
and which...
Silja Christine Thewes
(DESY)
26/09/2012, 16:10
The production of SUSY particles at the LHC is dominated by processes involving coloured sparticles in the final state. Due to the high importance of these processes for SUSY searches at the LHC, precise theoretical predictions are needed. Higher-order QCD corrections are dominated by large logarithmic terms due to the emission of soft gluons from initial and final state particles. A...
Dr
Johannes Heinonen Heinonen
(University of Chicago)
26/09/2012, 16:30
Based on my work arxiv:1208.0601 with R. Hill and M. Solon, I will present a formalism derived from Wigner's little group that allows the construction of heavy particle effective Lagrangians with a Lorentz invariant S-matrix. In contrast to some previous approaches this is achieved directly by field transformations without calculating the Lorentz charges and their commutation relations. I...
Sophia Borowka
(MPI Munich)
26/09/2012, 16:30
In this talk the new version of the public program SecDec 2.0 for the
numerical evaluation of multi-loop integrals with several mass scales
is presented.
The program is based on sector decomposition to extract dimensionally regulated singularities. To deal with integrable singularities due to mass thresholds, the integration contour is deformed into the complex plane. As applications,...
Mr
Nicolas Greiner
(Max-Planck-Institut fuer Physik)
26/09/2012, 16:50
In this talk I will present GoSam, a public package to compute one-loop corrections within and beyond the Standard Model. I will discuss how to use this package as well as phenomenological aspects and recent developments.
Dr
He Zhang
(MPIK)
26/09/2012, 16:50
Particle Phenomenology
In this talk, I will briefly review the phenomenology of light sterile neutrinos. Then I will concentrate on the theoretical realizations of light sterile neutrinos, in particular a model based on flavor A4 symmetry and Froggatt-Nielsen mechanism.
Dr
Guillaume Chalons
(TTP-KIT)
27/09/2012, 14:00
We consider the most general CP-conserving renormalizable effective scalar potential involving two doublets plus one singlet Higgs and satisfying the electroweak gauge symmetry. After deriving the electroweak-symmetry breaking conditions, we focus our attention on specific cases, characterized by specific symmetry properties and/or relations to supersymmetry-inspired extensions of the Standard...
Mr
Camilo A. Garcia Cely
(Phd Student)
27/09/2012, 14:20
The couplings of the low scale type I See-Saw model are severely constrained by the requirement of reproducing the correct neutrino mass and mixing parameters, by the non-observation of lepton number and charged lepton flavour violating processes and by electroweak precision data. We show that all these constraints still allow for the possibility of an exotic Higgs decay channel into a light...
Dr
Torsten Pfoh
(DESY Zeuthen)
27/09/2012, 14:20
We present improved predictions for the total hadronic cross section
of gluino pair production at hadron colliders including NNLO threshold
corrections. Here, we give analytic formulas for the color-decomposed
NLO and (approximated) NNLO scaling functions, which allow for a resummation of Sudakov logarythms up to NNLL. We perform the resummation in Mellin space and give analytic results...
Dr
Martin Wiebusch
(Karlsruhe Institute of Technology)
27/09/2012, 14:40
In this talk I present results of a global analysis of electroweak
precision data and Higgs signal strengths in the context of the Standard
Model with three and four fermion generations. I re-examine the SM electroweak fit with the new input on the Higgs mass and discuss the effect of a fourth fermion generation on the Higgs signal strengths. To quantify the level at which a fourth fermion...
Mr
Chris Wever
(ITF Utrecht University)
27/09/2012, 14:40
We present predictions of the total production cross sections of pairs of squarks and gluinos at the LHC, which incorporate a combined resummation of soft logarithms and Coulomb singularities, including bound-state contributions. These terms dominate the threshold region of the partonic cross section and are resummed directly in momentum space using an effective-theory framework based on SCET...
Joachim Kopp
(Max Planck Institute for Nuclear Physics)
27/09/2012, 15:00
As experimental evidence for a Higgs boson with a mass around 125 GeV is mounting, the question whether its couplings are Standard Model-like is becoming more and more important. Deviations from the Standard Model predictions could for example point to the existence of secondary mechanism of electroweak symmetry breaking such as additional Higgs doublets, or to other types of new physics not...
Mr
Sebastian Paßehr
(Max Planck Institute for Physics)
27/09/2012, 15:00
The anomalous magnetic moment of the muon, aμ , is an important quantity to test the Standard Model. The highly precise experimental and theoretical determination of aμ leads to a discrepancy of 3 to 4σ. This deviation could be explained by contributions of the MSSM. To be competitive to the high accuracy of the experiment, in particular the future improved measurements, and the SM theory...
Prof.
Tsutomu Yanagida
(University of Tokyo / IPMU)
27/09/2012, 15:50
I will explain why I belive in low energy SUSY more strongly than before the LHC.
Dr
Martin Spinrath
(SISSA)
27/09/2012, 16:10
We analyse the naturalness of the Minimal Supersymmetric Standard Model (MSSM) in the light of recent LHC results from the ATLAS and CMS experiments. We study non-universal boundary conditions for the scalar and the gaugino sector, with fixed relations between some of the soft breaking parameters, and find a significant reduction of fine-tuning for non-universal gaugino masses. For a Higgs...
Dr
Kai Schmidt-Hoberg
(Oxford University)
27/09/2012, 16:30
I will discuss phenomenological aspects of the GNMSSM.
Mr
Jan Heisig
(University of Hamburg)
27/09/2012, 16:50
We present the phenomenology of the gravitino dark matter scenario at the LHC. We consider the case that the next-to-lightest supersymmetric particle (NLSP) is the lighter stau. For a wide range of gravitino masses the lighter stau is stable on the scale of a detector. Such a particle will give rise to a prominent signature as a ’slow muon’. The dominant production channel of staus depends...
Dr
Tania Robens
(IKTP, TU Dresden)
27/09/2012, 16:50
We discuss the use of the variable s_hat_min, which has been proposed in order to measure the hard scale of a multi parton final state event using inclusive quantities only, on a SUSY data sample for a 14TeV LHC. In its original version, where this variable was proposed on calorimeter level, the direct correlation to the hard scattering scale does not survive when effects from soft physics are...
Dr
Thomas Flacke
(University of Wuerzburg and KAIST)
27/09/2012, 17:40
Models with a universal extra dimension (UED), in which all Standard Model fields propagate, predict a rich LHC phenomenology at the TeV scale. We present bounds on the minimal UED, split UED, and non-minimal UED models from the data taken in the first phase of the LHC. We compare our results with existing bounds from flavor physics and electroweak precision tests, thereby showing how much...
Dr
Takashi Shimomura
(Niigata Univ., Japan/MPIK, Germany)
27/09/2012, 17:40
We study the next-to-minimal supersymmetric standard model.
We consider soft supersymmetry breaking parameters, which are induced by the mirage mediation mechanism of supersymmetry breaking. We concentrate on the mirage mediation, where the so-called mirage scale is
the TeV scale. In this scenario, we can realize the effective mu-term
the up-type Higgs soft mass of O(200) GeV, while other...
Dr
Masaki Asano
(University of Hamburg)
27/09/2012, 18:00
Current results of LHC experiments exclude large area of light new particle
region, namely natural parameter space, in supersymmetric extension models.
One of the possibilities for achieving the correct electroweak symmetry break-
ing naturally is low scale messenger scenario. Actually, the next-to-minimal
supersymmetric standard model with TeV scale mirage mediation realizes the
natural...
Tigran Kalaydzhyan
(DESY)
27/09/2012, 18:20
In this talk I will argue that the strongly coupled quark-gluon plasma formed at LHC and RHIC can be considered as a chiral superfluid. The 'normal' component of the fluid is the thermalized matter in common sense, while the 'superfluid' part consists of long wavelength (chiral) fermionic states moving independently. I use several nonperturbative techniques to demonstrate that. First, I...
Anthony Hartin
(DESY)
27/09/2012, 18:40
Particle Phenomenology
In future linear colliders, ultrarelativistic charge bunches with associated electromagnetic fields approaching or exceeding the Schwinger limit, will interact at the IP. With such strong fields, vacuum polarisation becomes significant and, in order to quantify
the effect on physics processes, new analytic calculations in the Furry interaction picture are necessary. Up to now, Furry picture...
Dr
Enrico Maria Sessolo
(NCBJ Warsaw)
27/09/2012, 18:40
We present an updated global analysis of the GUT-constrained models CMSSM and CNMSSM, taking into account the recent observation of a SM Higgs-like signal at the LHC. In both our analyses, we implement the CMS razor limit on supersymmetry, based on ~5/fb datasets, with an approximate but accurate likelihood map constructed through a simulation of the detector efficiency.
In the CNMSSM we...
Dr
Moritz McGarrie
(DESY)
27/09/2012, 19:00
Particle Phenomenology
We examine what scattering cross sections of Visible to Hidden sectors that break SUSY and are strongly coupled can tell us about supersymmetry breaking and its mediation. We apply Vector Meson Dominance and Holographic techniques to encode resonances in visible to hidden sector processes. We draw on analogies with QCD and the AdS/QCD programme.
