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Planck 2013&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

20–24 May 2013
Bonn
Europe/Berlin timezone

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Contribution List

131 / 131
2. The LHC: Latest news from the energy frontier
Mr Butterworth Jonathan
20/05/2013, 09:00
3. Implications of the Higgs discovery
Mr Abdelhak Djouadi
20/05/2013, 10:00
4. SUSY after the Higgs
Sabine Kraml (LPSC Grenoble)
20/05/2013, 11:00
5. Scales of supersymmetry breaking and flavor models
Mr Stefan Pokorski
20/05/2013, 11:30
6. Are we done with the LHC?
Mr Hitoshi Murayama
20/05/2013, 12:00
7. Do we need an LC to see SUSY?
Prof. Gudrid Moortgat-Pick (University of Hamburg / DESY)
20/05/2013, 14:30
8. Higgs thermal inflation and low energy supersymmetry
Mr Tim Jones
20/05/2013, 15:00
9. The Status of Constrained SUSY, and implications from the Higgs
Mr Philip Bechtle
20/05/2013, 15:30
10. The MSSM Higgs Mass Revisited
Howie Haber
20/05/2013, 16:30
11. Fermi 130 GeV gamma ray line as an indirect signal of DM
Mr Martti Raidal
20/05/2013, 17:00
12. Visible sector models of inflation and curvaton
Mr Anupam Mazumdar
20/05/2013, 17:30
13. Cosmology and astroparticle physics after Planck
Mrs Laura Covi
21/05/2013, 09:00
14. Acceleration, then and now
Mr Cliff Burgess
21/05/2013, 10:00
15. Probing High-Scale Physics with Planck
Mr Daniel Baumann
21/05/2013, 11:00
16. Dark Matter in the Discovery Age
Mr Dan Hooper
21/05/2013, 11:30
17. Exponential mass hierarchies and cosmology
Mr Zygmunt Lalak
21/05/2013, 12:00
56. An enhanced CMB power spectrum from quantum gravity
Giampiero Esposito
21/05/2013, 14:00
We evaluate the modifications to the CMB anisotropy spectrum that result from a semiclassical expansion of the Wheeler–DeWitt equation for a real scalar field coupled to gravity in a spatially flat FLRW universe. Recently, such an investigation has led to the prediction that the power at large scales is suppressed. We make here a more general analysis and show that there is an ambiguity in the...
47. Compressed SUSY and Gauge Coupling Unification
Martin Winkler
21/05/2013, 14:00
I study precision gauge coupling unification (PGU) in the MSSM with pure gravity and mixed gravity/anomaly mediation. Implications of PGU for SUSY searches at the LHC are discussed.
66. Light RPV stops hiding in the LHC data
Riccardo Torre
21/05/2013, 14:00
I will discuss the 8 TeV LHC reach on pair produced heavy flavored di-jet resonances. Motivated by theories of R-parity violation in supersymmetry I will concentrate on a final state with two b-jets and two light jets. I will exploit b-tagging to reject the background and discuss its importance at the trigger level to probe light stops. I will also present kinematical selections that can be...
38. MFV in 2HDM
Margarida Nesbitt Rebelo
21/05/2013, 14:00
We discuss extensions of the Standard Model with two Higgs doublets, where there are flavour changing neutral currents both in the quark and leptonic sectors, with their strength controlled by the fermion mixing matrices $V_{CKM}$ and $V_{PMNS}$. These models are an extension to the leptonic sector of the class of models previously considered by Branco, Grimus and Lavoura, for the quark...
48. A model for light sterile neutrinos
Stéphane Lavignac
21/05/2013, 14:30
Some experimental anomalies suggest the possible existence of light sterile neutrino(s) mixing with the active ones. In this talk, we present a (supersymmetric) scenario in which the sterile neutrino is the fermionic partner of the pseudo-Goldstone boson associated with the spontaneous breaking of an approximate global symmetry. This property protects the sterile neutrino mass against large...
39. Complementarity of Bs->mu+mu- and B-> K l+l- decays in New Physics searches
Nejc Kosnik
21/05/2013, 14:30
We discuss the advantages of combining the experimental bound on Br(B_s -> mu+ mu-) and the measured Br(B -> K l+l-) to get the model independent constraints on physics beyond the Standard Model. Since the two decays give complementary information, one can study not only the absolute values of the Wilson coefficients that are zero in the Standard Model, but also their phases. We study...
67. Light stops emerging in WW cross section measurements?
Krzysztof Rolbiecki
21/05/2013, 14:30
Recent ATLAS and CMS measurements show a slight excess in the WW cross section measurement. While still consistent with the Standard Model within 1-2 sigma, the excess could be also a first hint of physics beyond the Standard Model. We argue that this effect could be attributed to the production of scalar top quarks within supersymmetric models. The stops of mass ~200 GeV has the right cross...
57. Results for Leptogenesis from Non-Equilibrium Field Theory
Björn Garbrecht
21/05/2013, 14:30
We explain how non-equilibrium methods give rise to NLO corrections to the theory of unflavoured Leptogenesis in the strong washout regime. New LO predictions are made available in the weak washout case (including Leptogenesis from mixing light sterile neutrinos) and for the transition between the flavoured and unflavoured regimes. As a new source of CP-violation, we identify the mixing of...
59. Gravitational waves from the sound of a first-order phase transition
Stephan Huber
21/05/2013, 15:00
I will report on the first numerical 3+1D simulation of a thermal first-order phase transition. The simulation includes a scalar field plus a relativistic fluid. We follow the evolution and collisions of the bubbles related to the phase transition. We compute the generated gravitational wave spectrum, and find that their prime source are sound produced by the colliding bubbles.
40. Heavy neutrino search in accelerator-based experiments
Atsushi Watanabe
21/05/2013, 15:00
It is known that heavy sterile neutrinos (HSN) of order 100 MeV can serve as an agent of the baryon asymmetry and successful supernova explosions. We explore the feasibility of detecting such HSN by the existing facilities of neutrino experiments. Taking the T2K experiment as a typical example, we find that the HSN are copiously produced at the secondary beam line and their decays taking place...
49. The naturally light dilaton
Paolo Lodone
21/05/2013, 15:00
The Goldstone theorem does not apply straightforwardly to the case of spontaneously broken spacetime symmetries such as dilatation invariance. We elucidate under which conditions a light scalar degree of freedom, identifiable with the dilaton, can naturally arise in a field theory. Our construction can be considered as an example of an explicit dynamical solution to the Cosmological Constant...
58. Top and bottom partner production in composite Higgs models at the LHC
Jose Santiago
21/05/2013, 15:00
Natural composite Higgs models predict light top and bottom partners, vector-like quarks that mix strongly with the top and bottom quarks. We describe the strategy to discover them and the Large Hadron Collider and their use to explore further aspects of models of strong electroweak symmetry breaking.
50. Low scale SUSY breaking and its LHC signatures
Pantelis Tziveloglou
21/05/2013, 16:00
Scenarios in which the supersymmetry breaking scale is not far above the soft parameters of the Minimal Supersymmetric Standard Model (MSSM) have two main consequences for model building. First, the particle spectrum is extended by an almost massless gravitino and possibly a sgoldstino scalar. Second, the MSSM interactions receive significant corrections from higher dimensional effective...
41. Neutrino mixing in an extended Babu-Ma-Valle model
David Vanegas Forero
21/05/2013, 16:00
Recently the last of the neutrino mixing angle $\theta_{13}$ has been measured giving a non zero value. Using discrete symmetries to successfully explain lepton mixing is still possible. As an example, we have modified the so called Babu-Ma-Valle model in such a way that we account for the current neutrino mixing values at 3 $\sigma$.
68. Spin-1 resonances as a signature of composite Higgs at the LHC
Anna Kaminska
21/05/2013, 16:00
This talk will focus on the consequences of electroweak symmetry breaking by strong dynamics, assuming the existence of a light composite scalar appearing as a pseudo- Goldstone boson of some global symmetry of the new strongly interacting sector. In such a scenario, the composite scalar has properties very similar to the Standard Model Higgs, but the existence of additional resonances with...
60. Strong phase transitions in 2HDM
Glauber Carvalho Dorsch
21/05/2013, 16:00
We do a random scan over the parameter space of the two-Higgs-doublet model searching for points with a strong phase transition. The results show that the model is a robust candidate for explaining baryogenesis, especially in the light of the recent results by ATLAS and CMS regarding the properties of the recently discovered scalar.
61. A predictive scheme for triplet leptogenesis
Benoit Schmauch
21/05/2013, 16:20
I present a model of baryogenesis through leptogenesis, inspired from arXiv:0804.0801, in which a lepton asymmetry is generated by the CP-violating decay of an electroweak scalar triplet. This triplet also gives rise to neutrino Majorana masses through the type II seesaw mechanism. Therefore, there is a very direct link between the CP asymmetry and neutrino parameters, which are already known...
51. Flavour-messenger unification
Jacek Pawełczyk
21/05/2013, 16:20
The motivation behind flavour-messenger unification originates from some F-theory constructions of GUT theories where flavour and messengers come from the same D7-brane intersection. This means that messengers and visible matter should be treated on equal footing. This scenerio has very strong consequences on model building and low energy phenomenology.
69. Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
Antonio Racioppi
21/05/2013, 16:20
We analyze the impact of effective axial-vector coupling of the gluon on spin polarization observables in $t\bar{t}$ pair production at the LHC (arXiv:1212.3272, to appear on PRD). Working at leading order in QCD, we compute the $t\bar{t}$ spin-correlation and left-right spin asymmetry coefficients in the helicity basis in the laboratory frame as functions of the new physics scale $\Lambda$...
42. UV completions of A4 models with viable theta13
Ivo de Medeiros Varzielas
21/05/2013, 16:20
The ultraviolet completion of flavour models can strongly improve the predictivity of the respective effective models. We consider A4 models, existing minimal UV completions and construct several next-to-minimal UV complete models. We compare the results of these possibilities to the experimental data including theta13. Through the predictive power of the UV completions, we are able to either...
52. A portal extension of the standard model with an unbroken local dark U(1)
Wan-Il Park
21/05/2013, 16:40
We propose an extension of the standard model in which dark sector respects an unbroken local U(1) symmetry and communicates with standard model sector via portal interactions of Higgs, right-handed neutrinos and kinetic mixing. Various constraints and physics involved in the model are discussed.
43. Lepton Mixing Patterns from a Scan of Finite Discrete Groups
Kher Sham Lim
21/05/2013, 16:40
The recent discovery of a non-zero value of the mixing angle theta_13 has ruled out tri-bimaximal mixing as the correct lepton mixing pattern generated by some discrete flavor symmetry (barring large next-to-leading order corrections in concrete models). In this work we assume that neutrinos are Majorana particles and perform a general scan of all finite discrete groups with order less than...
70. The MSSM at the end of LHC Phase 1 - status report
Enrico Maria Sessolo
21/05/2013, 16:40
The discovery of the Higgs boson at 126 GeV seems to imply masses in the multi-TeV regime for the simplest constrained SUSY models. Such a heavy supersymmetric spectrum is somewhat at odds with the naturalness criterion. Moreover, in such a framework it is impossible to obtain the correct value of $(g-2)_\mu$. By construction, SUSY models with light sleptons and light third generation squarks...
62. Tribrid inflation: a framework for connecting inflation with particle physics
David Nolde
21/05/2013, 16:40
We discuss recent progress on supersymmetric tribrid inflation, a variant of hybrid inflation which is particularly suited for connecting inflation with particle physics. Inflation ends with a phase transition near the GUT scale, and the inflaton can be a D-flat combination of charged fields in the matter sector of the particle theory. This relates the inflaton couplings -- which can be...
63. Higgs-Dilaton Cosmology: an effective field theory approach
Javier Rubio
21/05/2013, 17:00
The Higgs-Dilaton cosmological model describes simultaneously an inflationary period in the early Universe and a dark energy dominated stage responsible for the present day acceleration. The common origin of both processes gives rise to a non-trivial relation between the spectral tilt of scalar perturbations and the dark energy equation of state. We study the self-consistency of this model...
44. Muon conversion to electron in nuclei in type-I seesaw models
Mikael Dhen
21/05/2013, 17:00
The talk will be based on the paper arXiv:1209.2679, in which is computed the μ → e conversion in the type-I seesaw model, as a function of the right-handed neutrino mixings and masses. The definite predictions will be presented and discussed. In particular, the ratios between the μ → e conversion rate for a given nucleus and the rate of two other processes which also involve a μ − e flavor...
53. Phenomenology of Bulk Higgs-Radion Mixing
Andrew Spray
21/05/2013, 17:00
The discovery of the Higgs candidate boson last year offers a new tool to investigate BSM physics. Models with warped extra dimensions involve an additional scalar, the radion, which can mix with the Higgs. This mixing has been previously considered for Higgses localised on the infrared brane. We extend these studies to two further classes of models: those with a bulk Higgs, and gauge-Higgs...
71. Using top polarization for improving third generation squark searches
Suchita Kulkarni
21/05/2013, 17:00
If supersymmetry is the solution to the Higgs mass hierarchy problem, this requires the existence of light stops and sbottoms. The current reach of the experimental searches for stops and sbottoms at the LHC is however still limited. In this work, we exploit the information about top polarization in sbottom (and stop) decays into tops, in order to gain better control over the signals arising...
54. Low-energy predictions of yukawa-deflected gauge mediation models"
Tomasz Jelinski
21/05/2013, 17:20
Recent discovery of Higgs-like particle at the LHC points to modifications of standard gauge mediation models. Those which have attracted the most attention contain additional interactions between messengers and matter. During the talk I will discuss the role of such messenger-matter couplings and give examples of low-energy spectra in that class of models.
64. On the electroweak vacuum stability in the inflationary Universe
Kohei Kamada
21/05/2013, 17:20
Recent LHC results suggest the electroweak vacuum metastability. Although its lifetime is longer than the cosmic age in almost all the parameter space, quantum tunneling to the unwanted true vacuum in the quasi-de Sitter background may occur during inflation. This, in turn, constrains severely high-scale inflation models. In this talk, we discuss how to avoid such tunneling during high-scale...
45. Revisiting the Г(K→eγ)/Г(K→μγ) ratio in supersymmetric unified models
Renato Fonseca
21/05/2013, 17:20
It has been pointed out that supersymmetric extensions of the Standard Model can induce significant changes to the theoretical prediction of the ratio Γ(K→eν)/Γ(K→μν)=RK, through lepton flavor violating couplings. We shall discuss these new contributions to RK arising in the context of different constrained supersymmetric models which succeed in accounting for neutrino data, further...
72. Supersymmetric Parameter Determination at the LHC using a Neural Network
Nicki Bornhauser
21/05/2013, 17:20
Finding signs of new physics and even knowing the underlying theory does not automatically come along with the knowledge of the model parameters. In most new physics theories the relation mapping the measured observables onto the model parameters is unknown. In this talk the ability of a neural network is demonstrated to find this unknown relation in parameter space. As example different...
55. Effective action in quantum gravity
Leslaw Rachwal
21/05/2013, 17:40
We present the formalism of computing one-loop effective action for quantum gravitation using non-local heat kernel methods. We find agreement with previous old results. In main part of my talk I consider the system of E-H gravitation and scalar fields. We are able to derive nonlocal quantum effective action up to the second order in heat kernel generalized curvatures. By going to flat...
65. On the requirements for a successful WIMPy baryogenesis
Lorenzo Ubaldi
21/05/2013, 17:40
I give a brief overview of a recently proposed mechanism dubbed WIMPy baryogenesis. A stable Weakly Interacting Massive Particle (WIMP) is the Dark Matter (DM) candidate. Via CP-violating annihilations of the WIMP into a quark and an exotic heavy antiquark, one gets not only the right DM thermal relic abundance but also generates the observed baryon asymmetry. I discuss the key ingredients of...
73. Probing dynamical electroweak symmetry breaking with cosmic rays
Dennis D. Dietrich
21/05/2013, 17:40
The energies attained by cosmic rays offer an opportunity for probing the mechanism for dynamical electroweak symmetry breaking directly. In this talk we will discuss which signals are expected to be observed in air showers in the presence of such mechanisms.
46. SU(5)-type unification of Yukawa couplings of fermions in MSSM
Mateusz Iskrzyński
21/05/2013, 17:40
What are the conditions, a minimal phenomenologically viable supersymmetric grand unified theory should fulfill? Here, we address the possibility of unification of eigenvalues of down-quark and lepton Yukawa matrices in the framework of renormalizable MSSM. Results will be presented together with a discussion of current values of relevant low-energy observables. This will present an update to...
18. Critical issues in flavor physics
Mr Antonio Masiero
22/05/2013, 09:00
19. Flavour physics in the Higgs Era
Mr Gustavo C. Branco
22/05/2013, 10:00
20. Adding flavor to Higgs studies
Mr Gino Isidori
22/05/2013, 11:00
21. Flavour physics, supersymmetry, and GUTs
Prof. Ulrich Nierste (Karlsruhe Institute of Technology)
22/05/2013, 11:30
22. Neutrino Mass: status and implications
Mr Jose VALLE
22/05/2013, 12:00
74. Discrete Symmetries in Global MSSM-like D-Brane Models
Gabriele Honecker
22/05/2013, 14:00
Discrete symmetries are usually invoked to explain the absence of baryon- and lepton-number violating operators in the MSSM. In global D-brane models, discrete Z_n symmetries arise as remnants of massive Abelian gauge symmetries. I will discuss the conditions for the existence of Z_n symmetries in intersecting D-brane worlds on orbifold backgrounds. An examplary global model with particle...
98. Froggatt-Nielsen models with derived Z4 R-symmetry
Christoph Luhn
22/05/2013, 14:00
The observed hierarchies of fermion masses and mixing angles can be explained in the framework of Froggatt and Nielsen by imposing a family dependent U(1) symmetry. Based on a supersymmetric setting, we consider the possibility of a flavor U(1) R-symmetry which breaks down to a remnant Z4 R-symmetry. While containing R-parity as a subgroup, this discrete R-symmetry provides a solution to the...
90. keV Neutrino Dark Matter
Alexander Merle
22/05/2013, 14:00
In this talk, an introduction to keV sterile neutrinos as Dark Matter particles is given. After reviewing the cosmological aspects of (Warm) Dark Matter, I will explain why the topic is interesting for particle physics model building and also point out the differences to ordinary neutrino model building. We will go through a couple of generic models, all of which yield interesting and...
82. The Scale-Invariant NMSSM and the 126 GeV Higgs Boson
Michael Schmidt
22/05/2013, 14:00
The recent LHC discovery of a Higgs-like resonance at 126 GeV suggests that the minimal supersymmetric standard model must be modified in order to preserve naturalness. A simple extension is to include a singlet superfield and consider the scale-invariant NMSSM, whose renormalizable superpotential contains no dimensionful parameters. This extension not only solves the \mu-problem, but can...
91. Correlations between Indirect Detection and Collider Signals in Decaying Dark Matter Scenarios
Giorgio Arcadi
22/05/2013, 14:30
Decaying dark matter is an interesting and viable alternative to the common paradigm of stable dark matter. Our purpose is to investigate whether the LHC can probe scenarios of decaying DM. Although the limits on the DM lifetime forbid the direct collider observation of its decays, the couplings responsible for these processes can determine, thanks to crossing symmetries, DM production cross...
99. Natural SUSY from a SU(2)xU(1) Flavor Model
Robert Ziegler
22/05/2013, 14:30
I am going to present a SUSY flavor model based on a global SU(2) and a gauged U(1) horizontal symmetry. In the fermion sector it closely resembles the successful predictions of the U(2) models for various relations between fermion masses and mixing angles. In the sfermion sector the U(1) acquires a large D-term vev which together with the usual F-term contribution leads to split spectrum in...
75. Neutrino mass textures from String symmetries
George Leontaris
22/05/2013, 14:30
tba
83. SO(10) meets LHC
Akin Wingerter
22/05/2013, 14:30
In terms of physics results, 2012 has been an exciting year. In July 2012, the ATLAS and CMS collaborations have discovered a new particle that is consistent with the Standard Model Higgs boson. At the same time, the LHC has pushed the lower limits for supersymmetric particles to new heights, and this has contributed to the anxiety in the physics community that SUSY, if realized in nature, may...
84. Light Staus and Enhanced Higgs Diphoton Rate in SUSY SO(10) Yukawa Unification
Marcin Badziak
22/05/2013, 15:00
In SUSY SO(10) GUT the top, bottom and tau Yukawa couplings unify at the GUT scale. It is shown that in a MSSM scenario restricted by top-bottom-tau Yukawa unification and the SO(10) gauge symmetry the low-energy SUSY spectrum may consist of the 125 GeV Higgs and light, strongly-mixed staus leading to enhanced Higgs diphoton rate.
100. Spontaneous CP violation in A4xSU(5) with Constrained Sequential Dominance 2
Martin Spinrath
22/05/2013, 15:00
We revisit a two right-handed neutrino model with two texture zeros, namely an indirect model based on A4 with the recently proposed new type of constrained sequential dominance (CSD2), involving vacuum alignments along the (0,1,-1)^T and (1,0,2)^T directions in flavour space, which are proportional to the neutrino Dirac mass matrix columns. In this paper we construct a renormalizable and...
92. The 130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio and antiproton data
Masaki Asano
22/05/2013, 15:00
An analysis of the Fermi gamma ray space telescope data has recently revealed a resolved gamma-ray feature close to the galactic center which is consistent with monochromatic photons at an energy of about 130 GeV. If interpreted in terms of dark matter (DM) annihilating into \gamma \gamma, this would correspond to a DM particle mass of roughly 130 GeV. The rate for these loop-suppressed...
76. The heterotic string on magnetized orbifolds
Stefan Groot Nibbelink
22/05/2013, 15:00
We give an alternative description of the Schoen manifold as the blow-up of a Z_2 × Z_2 orbifold in which one Z_2 factor acts as a roto-translation. Since for this orbifold the fixed tori are only identified in pairs but not orbifolded, four-dimensional chirality can never be obtained using standard techniques alone. This situation is typical for orbifolds that have vanishing Euler number....
93. Effective Theory of Dark Matter Decay into Monochromatic Photons and its Implications: Constraints from Associated Cosmic-Ray Emission
Tiziana Scarna
22/05/2013, 16:00
We show that there exists only a quite limited number of higher dimensional operators which can naturally lead to a slow decay of dark matter particles into monochromatic photons. As each of these operators inevitably induces decays into particles other than photons, we show that the g-lines it induces are always accompanied by a continuum flux of cosmic rays. Hence constraints on cosmic-ray...
85. Gauge Mediation beyond Minimal Flavor Violation
Lorenzo Calibbi
22/05/2013, 16:00
We discuss a minimal modification of Gauge Mediation in which the messenger sector couples directly to the MSSM matter fields. These couplings are controlled by the same dynamics that explain the flavor hierarchies, and therefore are parametrically as small as the Yukawas. This setup gives rise to an interesting SUSY spectrum that is calculable in terms of a single new parameter. Due to large...
77. Inflation in the random SUGRA landscape
Francisco Pedro
22/05/2013, 16:00
tba
101. Neutrino Mass from a d=7 Effective Operator in a SUSY-GUT Framework
Martin Krauss
22/05/2013, 16:00
If the d=5 Weinberg operator is forbidden by a discrete symmetry, neutrino mass can be generated by new physics at the TeV scale, which can be tested at the LHC. We want to discuss models where neutrino mass originates from a d=7 operator in the framework of SUSY-GUTs containing an SU(5) subgroup. The embedding in GUT multiplets has phenomenological consequences, which we want to discuss on...
102. CP and Discrete Flavour Symmetries
Martin Holthausen
22/05/2013, 16:20
We discuss issues surrounding the definition of CP transformations in theories with discrete flavour symmetries. We will show that the consistency of the theory implies that every generalised CP transformation can be interpreted as a representation of an automorphism of the discrete group. Using this formalism, we will discuss various approaches that try to derive CP phases from geometrical...
94. Internal Bremsstrahlung Signatures from Dark Matter Annihilations in Light of Direct Detection and Collider Searches
Stefan Vogl
22/05/2013, 16:20
Over the last years direct dark matter detection, collider searches and gamma ray observations have made tremendous progress towards probing dark matter. In particular searches for gamma ray lines have attracted a lot of attention during the last year. A well known alternative to gamma lines is provided by the hard spectrum of Internal Bremsstrahlung. We investigate the importance of direct...
86. Minimal SUSY SU(5) GUT in the high-scale SUSY scenario
Natsumi Nagata
22/05/2013, 16:20
We revisit the minimal supersymmetric SU(5) grand unified theory (SUSY SU(5) GUT) in the high-scale SUSY scenario. Although the model has been believed to be excluded due to the too short lifetime of proton, we have found that it is possible to evade the experimental constraints on the proton decay rate if the supersymmetric particles have masses much heavier than the electroweak scale. Since...
78. Moduli Stabilization and Cosmology With Poly-Instanton Corrections
Pramod Shukla
22/05/2013, 16:20
In the context of type IIB orientifold compactifications, we present a new class of Kaehler moduli inflation realized in the LARGE volume scenarios. The inflaton is a Kaehler modulus corresponding to the volume of a so-called "Wilson" divisor which is relevant for supporting the poly-instanton corrections. Further, this standard single-field model is generalized into a two-field model by the...
79. A Zip-Code for Quarks Leptons and Higgs Bosons
Paul Oehlmann
22/05/2013, 16:40
The location of matter fields and the pattern of gauge symmetry in extra dimensions are crucial ingredients for string model building. We analyze realistic MSSM models from the heterotic Z6 Mini-Landscape and extract those properties that are vital for their success. We find that Higgs bosons and the top quark are not localized in extra dimensions and live in the full D=10 dimensional...
103. Electroweak Precision Tests of Composite Higgs Models
Oleksii Matsedonskyi
22/05/2013, 16:40
We examine the compatibility of the composite Higgs models with the constraints coming from Electroweak Precision Tests from the low-energy effective theory (EFT) prospective. The EFT approach allows us to capture the common features of the composite Higgs models and incorporate a broad class of explicit models. In our analysis we concentrate on the effects related to a presence of relatively...
95. Study of internal bremsstrahlung in the inert doublet model
Camilo A Garcia Cely
22/05/2013, 16:40
We show evidence for the existence of internal bremsstrahlung signatures in the Inert Doublet Model (IDM). In particular, we show they naturally arise in the high dark matter mass regime due to the near-degeneracy of the extra scalar masses. We calculate the corresponding annihilation cross-sections and compare them against constraints coming from direct and indirect dark matter searches....
87. Supersymmetric quiver gauge theories: a phenomenological perspective
Andreas Goudelis
22/05/2013, 16:40
The recent LHC discovery of a Higgs-like particle that could be involved in electroweak symmetry breaking places strong bounds on the parameter space of supersymmetric models. In particular, it has been argued that minimal gauge mediated supersymmetry breaking scenarios seem to be at odds with a Higgs boson of ~126 GeV. Supersymmetric quiver gauge theories are an already well-established...
96. Dark Matter and Co-annihilation
Yi Cai
22/05/2013, 17:00
Co-annihilation can be dominant in many scenarios. We adopt an effective operator approach to the dark matter physics where co-annihilation is dominant in giving the right amount of relic abundance. The related collider constraints on these effective operators are also studied.
104. General Composite Higgs Models
David Marzocca
22/05/2013, 17:00
We construct a general class of pseudo-Goldstone composite Higgs models, within the minimal SO(5)/SO(4) coset structure. We characterize the main properties these models should have in order to give rise to a Higgs mass around 125 GeV. We assume the existence of relatively light and weakly coupled spin 1 and 1/2 resonances. In absence of a symmetry principle, we introduce the Minimal Higgs...
88. Little hierarchy problem for new physics just beyond the LHC
Marco Fabbrichesi
22/05/2013, 17:00
I discuss two possible extensions to the standard model in which an inert singlet scalar state that only interacts with the Higgs boson is added together with some fermions. In one model the fermions provide for a see-saw mechanism for the neutrino masses, in the other model for grand unification of the gauge couplings. Masses and interaction strengths are fixed by the requirement of...
80. Where is the PdV term in the first law of black hole thermodynamics?
Brian Dolan
22/05/2013, 17:00
A PdV term is introduced into the first law of black hole thermodynamics, with the volume being defined to be the variable thermodynamically conjugate to the pressure that arises from the cosmological constant. The black hole equation of state then bears a remarkable similarity to the van der Waals equation. The effect of this new term in the equation of state will be explored.
105. A minimally tuned composite Higgs model from an extra dimension
Andrea Thamm
22/05/2013, 17:20
I present the 5D realization of a composite Higgs model with minimal tuning. The Higgs is a (pseudo-)Goldstone boson from the spontaneous breaking of a global SO(5) symmetry to an SO(4) subgroup. The peculiarity of our construction lies in the specific choice of the SO(5) representations of the 5D fermions which reduces the tuning to the minimal model-independent value allowed by electroweak...
97. Anisotropies in the gamma-ray sky from galactic dark matter annihilation
Valentina De Romeri
22/05/2013, 17:20
High-energy photons from dark matter annihilation in dark matter halos and subhalos may contribute to the diffuse gamma-ray background. We study here the features of the angular power spectrum of the signal expected from dark matter annihilation in galactic halos and subhalos. We evaluate the anisotropy signal obtained from various galactic-sized cosmological simulations and discuss the...
89. Automatized generation of non-SUSY RGEs for a general gauge field theory
Florian Lyonnet
22/05/2013, 17:20
In light of the conspicuous absence of SUSY in the energy range explored by the LHC in 2012, non-supersymmetric BSM scenarios are becoming more and more attractive. One key ingredient in exploring such BSM physics are the renormalization group equations (RGEs) that are essential for extrapolating the theory to higher energy scales. Although the 2-loop RGEs for a general quantum field theory...
81. R Symmetries from Heterotic Orbifold Compactifications
Damian Kaloni Mayorga Pena
22/05/2013, 17:20
We consider the string theory origin of R-charge conservation laws in heterotic orbifold compactifications, deriving the corresponding string coupling selection rule for factorizable and non-factorizable orbifolds, with prime ordered and non-prime ordered point groups. R-charge conservation arises due to symmetries among the worldsheet instantons that can mediate the couplings. Among our...
23. String Phenomenology in the Higgs Era
Mr Luis Ibanez
23/05/2013, 09:00
24. New Aspects of Heterotic/F-theory duality
Mrs Lara Anderson
23/05/2013, 10:00
25. Non-geometric string compactification
Mr Ralph Blumenhagen
23/05/2013, 11:00
26. Hypercharge flux and U(1)s in F-theory GUTs
Mr Eran Palti
23/05/2013, 11:30
27. Precision gauge unification in strings
Prof. Michael Ratz (TU Munich)
23/05/2013, 12:00
115. Double Higgs production in a singlet-extended Higgs model
Jesus M. Moreno
23/05/2013, 14:00
In this talk we revisit the simplest Higgs sector extension containing an additional scalar singlet. We perform a detailed analysis of double Higgs production at the LHC, exploring in particular the bbWW channel. We also comment the relevance of the results for Higgs portal DM models.
124. The NMSSM with F-theory unified boundary conditions
Luis Aparicio
23/05/2013, 14:00
We study the phenomenological viablility of a constrained NMSSM with parameters subject to unified conditions from F-theory GUTs. We find that very simple assumptions about modulus dominance SUSY breaking in F-theory unification lead to a predictive set of boundary conditions , consistent with all phenomenological constraints.
116. BSM models face Higgs coupling data
Rick Sandeepan Gupta
23/05/2013, 14:30
We discuss how to probe Beyond Standard Model theories with Higgs coupling data. I will discuss, first, how much Higgs couplings deviate from their Standard Model values in different theories if no other states are accessible at the LHC. We will argue that this is the experimental precision required in the measurement of Higgs couplings. Finally, I will discuss how present and future Higgs...
125. The Higgs mass from stringy high scale SUSY
Alexander Knochel
23/05/2013, 14:30
The Higgs quartic coupling has now been indirectly measured at the electroweak scale. Assuming no new low-scale physics, its running is known and, together with gauge and Yukawa couplings, it is a crucial new piece of information constraining UV completions of the Standard Model. In particular, supersymmetry broken at an intermediate or high energy scale with low tan(beta) is consistent with...
117. Engineering a 125 GeV Higgs in the MSSM
Felix Bruemmer
23/05/2013, 15:00
The a 125 GeV Higgs boson can be most naturally realized within the MSSM if there is significant stop squark mixing. This talk deals with the difficulties in obtaining large stop mixing from high-scale SUSY breaking models. We detail the necessary conditions on the high-scale soft terms, and review several scenarios of SUSY breaking mediation with regards to their compatibility with maximal...
126. Scattering in general gauge mediation and holography
Moritz McGarrie
23/05/2013, 15:00
Supersymmetry breaking and its mediation can be reformulated as a scattering problem. This talk will outline how pion scattering and "bottom up" AdS/QCD models may be extended to describe strongly coupled hidden sectors that break supersymmetry. We look at what can "in-principle" be measured and what it can actually predict about the MSSM.
109. Naturalness of Light Neutralino Dark Matter
Yasutaka Takanishi
23/05/2013, 16:00
We (P. Grothaus, M. Lindner, Y. T.) investigate neutralino dark matter in the low-energy phenomenological minimal supersymmetric standard model taking account of the newest results from the Large Hadron Collider as well as all other experimental bounds from collider physics and the cosmological abundance. We find that near updates of direct searches signicantly rule out a large area of the...
110. Dark matter, singlet extensions of the nuMSM, and symmetries
Kyle Allison
23/05/2013, 16:20
The Lyman-alpha forest bound severely constrains the non-resonant production of warm dark matter in the nuMSM. It has been shown that an extension of the nuMSM by a Higgs singlet phi can provide a dark matter production mechanism through the decays of phi that readily satisfies or escapes the Lyman-alpha bound. I will discuss the astrophysical and cosmological constraints on such models and...
118. Modified Higgs Physics from Composite Light Flavors
Cedric Delaunay
23/05/2013, 16:30
Nature seems to have chosen a light scalar to unitarize WW scattering. Yet, the Higgs discovery at the LHC does not fully resolve the electroweak symmetry breaking puzzle and one is left to find out what renders the light scalar naturally insensitive to (unknown) very short distance dynamics. New Physics models where the Higgs emerges as a Goldstone boson of some new strong dynamics at the TeV...
127. Supersymmetric SO(10) GUTs with sliding scales
Carolina Arbeláez
23/05/2013, 16:30
We construct supersymmetric $SO(10)$ models with different intermediate scales, consistent with gauge coupling unification. We found the complete list of sets of fields that can be added in each regime that allows to preserve unification and a "sliding scale mechanism". Using mSugra boundary conditions we calculate some particular combinations of soft SUSY breaking terms, called "invariants",...
111. SUSY-QCD corrections to neutralino-stop co-annihilation
Quentin Le Boulc'h
23/05/2013, 16:40
We have computed the one-loop SUSY-QCD corrections for neutralino-stop coannihilation into electroweak gauge and Higgs bosons in the MSSM. I will show that these annihilation channels are phenomenologically relevant within the pMSSM, in particular in the light of the observation of the Higgs boson with a mass of about 126 GeV at the LHC. I will show numerical results for the cross sections and...
128. One-loop Corrections to Dark Radiation Production in LARGE Volume Models
Stephen Angus
23/05/2013, 16:50
Dark radiation is produced in LARGE volume models in which reheating is driven by the volume modulus decaying to the visible sector. Decays of this modulus to its axion partner provide the dark radiation. I will discuss the effects of one-loop radiative corrections to the only competitive MSSM decay channel: the decay into Higgs pairs via the Giudice-Masiero term. This alone will more...
119. The Effective Chiral Lagrangian for a Light Dynamical Higgs
Juan Alberto Yepes
23/05/2013, 16:50
The basis of CP-even chiral effective operators describing a dynamical Higgs sector, is generalized to the case in which the Higgs-like particle is light. Gauge a nd gauge-Higgs operators are considered up to mass dimension five. This analysis completes the tool needed to explore at leading order the connection between linear realizations of the electroweak symmetry breaking mechanism - whose...
112. Higgs couplings after Moriond 2013
Beranger Dumont
23/05/2013, 17:00
Performing a fit to all publicly available data, we analyze the extent to which the latest results from the LHC and Tevatron constrain the couplings of the Higgs boson-like state at ~ 125 GeV, as well as invisible (or undetected) decays. This is based on arXiv:1212.5244 (to appear in JHEP) and G. Belanger, BD, U. Ellwanger, J. F. Gunion, S. Kraml, in preparation.
129. Heterotic Calabi-Yau Compactifications with Flux
Eirik Eik Svanes
23/05/2013, 17:10
As is well known, a standard heterotic compactification to a maximally symmetric space-time does not allow for fluxes to stabilise moduli. By relaxing the condition of a maximally symmetric spacetime, I show how this no-go theorem may be avoided. I will work with the example of a domain wall for concreteness. After moduli stabilisation, the domain wall vacuum may be lifted by means of e.g...
120. Multiple Higgs and Vector boson production beyond the Standard Model
Alexandra Oliveira
23/05/2013, 17:10
If the electroweak symmetry breaking is originated from a strongly coupled sector, as for instance in composite Higgs models, the Higgs boson couplings can deviate from their Standard Model values. In such cases, at suficiently high energies there could occur an onset of multiple Higgs boson and longitudinally polarised electroweak gauge boson (VL) production. We study the sensitivity to...
113. Higgs signal at the LHC for the 4D Composite Higgs Model
Daniele Barducci
23/05/2013, 17:20
General Composite Higgs models provide an elegant solution to the hierarchy problem present in the Standard Model (SM) and give an alternative pattern leading to the mechanism of electroweak symmetry breaking (EWSB). We present a recently proposed realistic realization of this general idea analyzing in detail the Higgs production and decay modes. Comparing them with the latest Large Hadron...
121. Higgs to diphoton and vanilla new Physics
Enrico Bertuzzo
23/05/2013, 17:30
After an introduction on the current experimental status of the Higgs boson, I will study the effect of new vector-like fermions on the h -> gamma gamma channels, in which the effect of new physics may be already showing up. In particular, I will analyze colored and uncolored fermions in their smallest SU(2) representations, and the modifications to the previously mentioned channels in regions...
131. Proton Stability and Gauge Coupling Unification constraints on string derived models
Viraf Mehta
23/05/2013, 17:30
An appealing proposition to explain the suppression of proton decay mediating and other operators, in heterotic string derived models, is the existence of a low scale $Z^\prime$ that forbids the undesired operators, and thus may arise only after $Z^\prime$ breaking. We will discuss the constraints on such a $Z^\prime$ arising in string derived models and focus on the constraints arising from...
114. Constraints on models with universal extra dimensions from dilepton searches at the LHC
Lisa Edelhäuser
23/05/2013, 17:40
Models with universal extra dimensions predict that each Standard Model particle is accompanied by a tower of Kaluza-Klein resonances. Canonical searches for the production and cascade decays of first Kaluza-Klein modes through missing transverse momentum signatures suffer in general from low detection efficiencies because of the rather compressed Kaluza-Klein particle mass spectrum. We...
132. Fermion Mixing & Flavor Symmetries: Ideas & Models
Claudia Hagedorn
23/05/2013, 17:50
I will present ideas of how to predict fermion mixing with the help of discrete non-abelian flavor symmetries which are broken in a particular way and give examples of models in which such ideas are realized. In the leptonic sector emphasis will be put on the possibility to explain the recently measured value of the reactor mixing angle and the possibilities to predict CP violating phases.
122. Probing the two light Higgs scenario in the NMSSM with a low-mass pseudoscalar
Chan Beom Park
23/05/2013, 17:50
We propose a simultaneous collider search strategy for a pair of scalar bosons in the NMSSM through the decays of a very light pseudoscalar. The massive scalar has a mass around 126 GeV while the lighter one can have a mass in the vicinity of 98 GeV, thus explaining an apparent LEP excess, or be much lighter. The successive decay of this scalar pair into two light pseudoscalars, followed by...
106. Non-Equilibrium Thermal Dark Matter
Bryan Zaldivar
23/05/2013, 18:00
Dark Matter (DM) may have been produced out of thermal equilibrium in the early universe. This possibility has been investigated before through the so-called "Freeze-in" scenario of Feebly-Interacting-Massive-Particles. In this talk I show that this is just a particular case of a general out-of-equilibrium-generated DM, by describing new alternatives which are totally different at a...
123. Higgs phenomenology in the triplet extension of the MSSM
Germano Nardini
23/05/2013, 18:10
Extending the Higgs sector of the MSSM by triplets alleviates the little hierarchy problem and naturally allows for enhancements in the diphoton decay rate of the lightest CP-even Higgs. In this talk the Higgs phenomenology of this theory with a hyperchargeless triplet is analyzed. In particular, for any value m_A > m_h there is a parameter region where the CP-even Higgs sector appears at...
107. Interplay between Fermi gamma-ray lines and collider searches
Hyun Min Lee
23/05/2013, 18:30
We explore the interplay between lines in the gamma-ray spectrum and LHC searches involving missing energy and photons. As an example, we consider a singlet Dirac fermion dark matter with the mediator for Fermi gamma-ray line at 130 GeV. A new chiral or local U(1) symmetry makes weak-scale dark matter natural and provides the axion or Z' gauge boson as the mediator connecting between dark...
108. Two ultimate tests of constrained supersymmetry
Kamila Kowalska
23/05/2013, 19:00
The discovery of the Higgs boson at 126 GeV seems to imply masses in the multi-TeV regime for the simplest constrained SUSY models. Thus, with the exception of limited regions of the parameter space where stop mixing is large, in these scenarios the new physics might be out of reach even for the 14 TeV run. We discuss the prospects of using two alternative and complementary ways to explore the...
28. Review BSM Phenomenology
Mr Kiwoon Choi
24/05/2013, 09:00
29. Aspects of string phenomenology in the LHC era
Mr Ignatios Antoniadis
24/05/2013, 10:00
30. Origin and Phenomenology of Dark Radiation
Mr Joseph Conlon
24/05/2013, 11:00
31. Probing BSM physics with inflationary gravitational waves
Mr Takeo Moroi
24/05/2013, 11:30
32. New regions in the NMSSM with a 125 GeV Higgs
Mr Marek Olechowski
24/05/2013, 12:00
33. Axion Physics
Mr Jihn E. Kim
24/05/2013, 14:00
34. Composite Higgs vs LHC data
Andrea Wulzer
24/05/2013, 14:30
35. Status of constrained SUSY in light of LHC data
Leszek ROSZKOWSKI
24/05/2013, 15:00
36. Charginos and neutralinos, Higgs physics and LHC
Mr Alberto Casas
24/05/2013, 15:30
37. Physics Post LHC 8: Quo Vadis?
Mr Graham Ross
24/05/2013, 16:30
130. tba
Mahdi Torabian
tba
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