Bienvenue Room: Amphi Dirac

LHC Physics prospects (Exp.)

• Silvano Tosi (CNRS/IPNL)

Room: Amphi Dirac

Study on MSSM models with effective operators

• Guillaume Drieu La Rochelle (LAPTH)

Room: Amphi Dirac In this talk I will discuss some implications of higher order operators (dimension 5 and 6) on the MSSM spectrum. In particular I will state how the effective parameters appearing in those operators are constrained by current measurements, and how we can use the allowed range of those parameters to vary the masses in the Higgs, neutralinos and charginos sectors.

Impact of squark generation mixing on the search for superpartners at the LHC

• Björn Herrmann (Universität Würzburg)

Room: Amphi Dirac In supersymmetric models beyond minimal flavour-violation, generation-mixing terms in the squark or slepton sector can be sizeable. These off-diagonal entries of the corresponding mass matrices affect both the production and subsequent decay of SUSY particles at colliders. I will discuss scenarios that agree with the relevant experimental constraints and where the branching fractions of squarks into charm- and top-quarks are simultaneously large. I will the present recent results on the production of squarks and discuss possibly interesting signatures at the LHC.

Hidden Higgs

• Adam Falkowski (CERN)

Room: Amphi Dirac I will talk about a class of models where the light Higgs boson, 100 GeV or less, is consistent with all existing LEP constraints. Recent ideas along that direction include models where Higgs decays into four light hadronic jets, or into lepton jets. I will discuss the possibility to study this scenario at the LHC

Associated production of charged Higgs and top at LHC: the role of the complete electroweak supersymmetric contribution

• Luca Panizzi (IPNL)

Room: Amphi Dirac

Hypercharge Anomaly-Mediated Supersymmetry Breaking at the LHC

• Shibi Rajagopalan (University of Oklahoma)

Room: Amphi Dirac I will discuss the phenomenological consequences of Hypercharge Anomaly-Mediated Supersymmetry Breaking at the LHC. This string-inspired model combines a U(1) form of mediation with anomaly mediation to provide a viable pattern of MSSM masses and interesting signatures at the LHC.

Gravity waves from cosmological first-order phase transitions

• Thomas Konstandin (CERN)

Room: Amphi Dirac First-order phase transitions proceed by nucleation and expansion of bubbles filled with a new phase of the medium. An example in particle physics is given by the transition in the early Universe from unbroken to broken electroweak gauge symmetry. At the end of the phase transition the expanding bubbles collide and partially release their energy into gravitational wave radiation. I will focus on two aspects of this process: 1) The energy budget using hydrodynamic considerations. 2) The spectrum of the gravity waves given by geometric considerations and computer simulations.

The MSSM with GUT-scale degenerate Higgs masses

• Felix Bruemmer (IPPP Durham)

Room: Amphi Dirac An interesting class of UV completions of the MSSM gives rise to a specific structure of the Higgs mass matrix. Namely, in such models the diagonal and off-diagonal Higgs mass parameters are degenerate at the GUT scale. We explain the origins of this structure from higher dimensions, and we discuss some examples. We also present a numerical study of the phenomenological prospects of such models: By imposing Higgs mass degeneracy as a GUT-scale boundary condition for the RG evolution of the MSSM parameters, we can confront the emerging low-energy phenomenology with present experimental constraints.

Gravitino Dark matter and BBN

• Sean Bailly (LAPTH)

Room: Amphi Dirac Supersymmetry is an elegant extension of the standard model that presents many interesting features such as interesting candidates for dark matter. I will focus on the case of a stable gravitino as the lightest supersymmetric particle (LSP). Models with a gravitino LSP can also solve the lithium problems linked to big bang nucelosynthesis (BBN). Predicted abundances in the standard description of BBN are incompatible with observations. If the decay of the next to lightest supersymmetric particle into the gravitino occurs during BBN, the lithium problems can be solved.

A Dark Matter candidate from Lorentz Invariance in 6 Dimensions

• Jérémie Llodra-Perez (IPNL)

Room: Amphi Dirac I will present the unique 6 dimensional orbifold with chiral fermions where a stable dark matter candidate is present due to Lorentz invariance on the orbifold, with no additional discrete symmetries imposed by hand. We propose a model of Universal Extra Dimensions where a scalar photon of few hundred GeV is a good candidate for dark matter. The spectrum of the model is characteristic of the geometry, and it has clear distinctive features for the LHC phenomenology compared to previous models of Kaluza-Klein dark matter.

One-loop relic density with gauge pair production

• Guillaume Chalons (LAPTH)

Room: Amphi Dirac With the increasing accuracy of forthcoming experiments (like PLANCK), on the theoretical side a high level of precision is also needed, therefore cross sections need to be evaluated at least at NLO. This has been applied to the calculation of the relic density of dark matter with gauge boson pair production with the help of the automatic program SloopS.

SUSY GUTs with Yukawa Unification in the light of data

• Diego Guadagnoli (TU Munich)

Room: Amphi Dirac After a short overview of the hypothesis of Yukawa Unification within SUSY GUTs, I report on its viability in the light of the predictions for quark masses, EW precision data and FCNC processes. In particular, I discuss the phenomenological difficulties existing when universalities for the soft SUSY-breaking terms at the GUT scale are assumed, and how these difficulties can be overcome in simple and robustly motivated scenarios of non-universalities. Finally, I discuss the falsifiability of the latter scenarios at forthcoming experiments, primarily the LHC.

Direct detection review (Edelweiss, CDMS, Xenon) Room: Amphi Dirac

A stable dark matter candidate and grand unification without supersymmetry

• Michele Frigerio (SPhT, CEA-Saclay)

Room: Amphi Dirac

Dark matter in cosmic ray electrons and positrons

• Julien Lavalle (University of Torino)

Room: Amphi Dirac 1 year after the "PAMELA buzz", I will make a status on the search for dark matter signatures in cosmic ray spectra, focusing on electrons and positrons.

Gravitational waves from cosmological phase transitions

• Ruth Durrer (Université de Genève)

Room: Amphi Dirac Cosmology is to some extent a search for 'relics' of earlier phases of the Universe. A famous example of this is the is the cosmic microwave background. Another observational signature which would allow us to probe even earlier epochs of the Universe is a background of gravitational waves. In my talk I discuss the characteristics of the gravitational wave background we might expect from a first order phase transition in the early Universe and I outline the prospects of its observation.

Constraining dark matter scenarios with CMB

• Fabio Iocco (IAP - IPhT, CEA/Saclay)

Room: Amphi Dirac I will show how it is possible to use CMB observables to put constraints in different types of DM parameter space. In the case of self-annihilating DM the constraints are particularly strong, competitive with local, multimessenger ones. This method offers the advantage to get rid of astrophysical uncertainties and rely only on cosmological quantities and might have interesting consequences on our understanding of high redshift Universe as well.

Neutrino mass hierarchy in the double seesaw model

• Carla Biggio (Max Planck Institut fur Physik, Munich)

Room: Amphi Dirac

Minimal SUSY Inverse Seesaw

• Albert Villanova del Moral (LPTA Montpellier)

Room: Amphi Dirac

Turbulence and Supernova Neutrinos

• James KNELLER (IPNO)

Room: Amphi Dirac It has long been feared that the presence of turbulence in supernovae would erase the characteristic features in the neutrino signal of the next Galactic supernova that would have allowed us to determine fundamental properties of the neutrino and observe the explosion while it is still deep in the star. We examine the effect of turbulence upon the neutrinos and find that the damage to the signal is not as great as feared and that turbulence might also leave its own characteristic fingerprints in unexpected places.

Direct Photon Production In Association With A Heavy Quark Jet at Hadron and Ion Colliders

• Tzvetalina Stavreva (Florida State University/LPSC)

Room: Amphi Dirac The associated production of direct photons and heavy quarks probes the gluon and heavy quark PDFs. As such this process can be used to constrain those nPDFs and to distinguish between different nPDFs sets. Predictions for hadron and ion colliders (ALICE, RHIC) are shown.

Table ronde Room: Amphi Dirac

Lepton flavour violation

• Stéphane Lavignac (SPhT Saclay)

Room: Amphi Dirac Flavour violating processes are indirect probes of physics beyond the Standard Model, and are complementary to direct collider searches. In this talk, I will discuss lepton flavour violation in supersymmetric models, focusing on the possibility of disentangling various high-energy scenarios through correlations between different processes.

CP violation beyond the MSSM

• Cédric Delaunay (Weizmann Institute of Science)

Room: Amphi Dirac

Le régime de saturation de QCD mis en évidence à RHIC avec les nouvelles données d+Au

• Cyrille Marquet (IPhT - CEA/Saclay)

Room: Amphi Dirac

Monopoles, Anomalies, and Electroweak Symmetry Breaking

• John Terning (UC Davis/CERN)

Room: Amphi Dirac I discuss how to formulate a low-energy theory of chiral monopoles and how monopoles can give rise to electroweak symmetry breaking and a sufficiently large top quark mass.

Inflation from Phase Transitions in Scalar-Tensor theories

• Alessio Notari (University of Heidelberg)

Room: Amphi Dirac Inflation with tunneling from a false to a true vacuum is viable in the presence of a non-minimally coupled scalar field. As a by-product this field also sets dynamically the value of the Planck mass, which can be exponentially large. Therefore along with Inflation we also suggest a natural dynamical explanation for why gravity is so weak today. Moreover we predict a spectrum of gravity waves peaked at around 0.1 mHz, that will be detectable by the planned space inteferometer LISA and we discuss interesting predictions on cosmological scalar and tensor fluctuations in the CMB. Finally we discuss possible ways of making the additional scalar compatible with late-time constraints.

NLO corrections to ee->gt;WWZ and ee->gt;ZZZ

• Hao Sun (LAPTH)

Room: Amphi Dirac

Decoherence and thermalization in quantum field theory

• Julien Serreau (APC, University Paris 7)

Room: Amphi Dirac

La dualité AdS/CFT et le secteur scalaire de QCD

• Frédéric Jugeau (IHEP)

Room: Amphi Dirac Les fonctions de corrélation des opérateurs associés aux boules de glu et aux mésons scalaires sont étudiées dans le cadre de la correspondance AdS/CFT. En particulier, les masses, les constantes de désintégration aussi bien que des constantes de couplage et des valeurs de condensats sont calculées et comparées avec leurs estimations dans QCD.

Etude du contenu mésonique des protons via les processus exclusifs durs vers l'arrière

• Jean-Philippe Lansberg (Ecole Polytechnique- CPHT)

Room: Amphi Dirac Je discuterai les possibilités offertes par l'étude de processus exclusifs durs dans le régime arrière, tels que, d'une part, la diffusion Compton profondément virtuelle et l'électroproduction de méson à JLAB et COMPASS, et, d'autre part, la production d'une paire dilepton-meson dans des annihilations proton-antiprotons à GSI-FAIR.

Introduction du degré de liberté de spin dans les jets de quark

• Xavier Artru (IPNL)

Room: Amphi Dirac Les modèles actuels de fragmentation de quark ne tiennent pas compte du degré de liberté de spin. Or celui-ci influe sur les distributions azymutales (effet Collins et jet-handedness) et même sur le pT carré moyen. Nous présenterons un modèle ultra-simplifié où le spin est pris en compte tout au long de la cascade de fragmentation.

Distributions inclusives des particles dans les jets dans le vide et dans le milieu

• Redamy Perez (Universitat de Valencia IFIC-SCIC)

Room: Amphi Dirac