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Rencontres de Physique des Particules

14–16 mai 2012
Université Montpellier 2
Fuseau horaire Europe/Paris

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Liste des Contributions

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  1. 24. Mot de bienvenue / Welcome address
    The LOC
    14/05/2012 09:45
  2. 9. Lepton flavour violation and neutrinos (review talk)
    Dr Martin Hirsch (IFIC/CSIC, Universidad Valencia)
    14/05/2012 10:00
  3. 3. Theta 13 after Daya Bay
    Pedro Machado (Universidade de São Paulo and CEA-Saclay)
    14/05/2012 10:40
    The lepton mixing angle theta 13, the only unknown angle in the standard three-flavor neutrino mixing scheme, is finally measured by recent reactor and accelerator experiments. We perform a combined analysis of the data coming from T2K, MINOS , Double Chooz, and Daya Bay, extracting a 6.2 sigma significance for nonzero theta 13. We also discuss near future expectations on the precision of the...
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  4. 28. Fitting neutrino physics with a U(1)_R lepton number
    Dr Enrico Bertuzzo (IPHT-CEA Saclay)
    14/05/2012 11:30
  5. 29. Lepton flavour violation at the LHC in SUSY seesaw type-I
    Dr Albert Villanova del Moral (LUPM Montpellier)
    14/05/2012 11:55
  6. 22. A Minimal Model of Neutrino Flavor
    Dr Akin Wingerter (LPSC)
    14/05/2012 12:20
    N.N.
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  7. 10. Lattice QCD and the search for new physics (review talk)
    Dr Laurent Lellouch (CPT)
    14/05/2012 14:30
  8. 31. Lattice computation of $K\to\pi\pi$ amplitudes
    Dr Nicolas Garron (university of Edinburgh)
    14/05/2012 15:10
  9. 32. Isospin breaking corrections to light hadron masses
    M. Antonin Portelli (Centre de Physique Théorique (CPT))
    14/05/2012 15:35
  10. 5. Probing $N_f=2$ chiral dynamics with topological zero-modes in the mixed chiral regim
    Dr Gregory Vulvert (IFIC Valencia)
    14/05/2012 16:00
    Lattice QCD benefits nowadays from numerous progess thanks to algorithmic enhancements to push down the quark masses to reach the physical masses and to increase the lattice geometry to avoid finite volume effects. However using fermions which do not break the chiral symmetry both in valence and sea sector is still a challenge. An alternative is to consider mixed action simulations, where one...
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  11. 8. Higgs and things (review talk)
    Dirk Zerwas (LAL Orsay)
    14/05/2012 16:50
  12. 35. Implications of a 125 GeV Higgs
    Dr Abdelhak Djouadi (LPT Orsay)
    14/05/2012 17:30
  13. 16. A Higgs signal Beyond the MSSM
    M. Guillaume Drieu La Rochelle (LAPTH)
    14/05/2012 17:55
    The BMSSM (Beyond the MSSM) framework is an effective theory approach that encapsulates a variety of extensions beyond the MSSM with which it shares the same field content. The lightest Higgs mass can be much heavier than in the MSSM without creating a tension with naturalness or requiring superheavy stops. The phenomenology of the Higgs sector is at the same time much richer. I discuss here...
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  14. 11. Dark stuff (review talk)
    Dr Malcolm Fairbairn (King's College London)
    15/05/2012 09:30
    I will (extremely) briefly review the evidence for dark matter and then the ongoing efforts to detect it using indirect and direct detection. I will talk about recent developments in indirect detection including a couple of potential signals from Fermi and some recent pessimistic predictions from N-body simulations. I will then review the ongoing search for dark matter via direct detection. ...
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  15. 18. Neutralino relic density with Next to Leading Order (co)annihilation cross-section
    M. Quentin Le Boulc'h (LPSC)
    15/05/2012 10:10
    The relic density of Dark Matter in the Universe imposes today one of the most stringent constraints on new physics models such as the Minimal Supersymmetric Standard Model (MSSM). The most recent analysis of the WMAP collaboration has already reached an accuracy of 3%, and the upcoming results obtained with the Planck satellite will be even more precise. It is therefore mandatory for the...
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  16. 52. Mixed sneutrino dark matter in light of recent experimental results
    Béranger DUMONT (LPSC Grenoble)
    15/05/2012 10:35
  17. 21. Probing the supersymmetric inflaton and dark matter link
    M. Jonathan Da Silva (Laboratoire d'Annecy-Le-Vieux de Physique Théorique)
    15/05/2012 11:30
    In this talk I will present a study on the NUHM2 supersymmetric model where both the cosmic inflation and the observed dark matter abundance can be explained, with a Higgs boson mass in the range favoured by the latest LHC data. The two inflaton candidates LLe and udd are embedded within the MSSM therefore their decay naturally excites all the relevant degrees of freedom which thermalizes the...
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  18. 25. Neutrinos are not in a rush
    Dr philippe brax (IPHT Saclay)
    15/05/2012 11:55
    I will describe how neutrinos could go faster than the speed of light in a dense environment if gravity were modified by a scalar field. I will show that the speed difference would almost always be unobservable for natural values of the couplings of scalars to matter.
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  19. 17. Lepton flavour violation in the inverse seesaw
    Cedric Weiland (LPT Orsay)
    15/05/2012 12:20
    The inverse seesaw is a very appealing mechanism to generate neutrino masses since it provides natural neutrino Yukawa couplings ($Y_\nu \sim O(1)$) and a seesaw scale close to the electroweak one, thus within LHC reach. In a previous work (arXiv:1111.5836) where we embedded the inverse seesaw in a supersymmetric extension of the Standard Model (MSSM), we have highlighted that the...
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  20. 13. Heavy ions (review talk)
    Dr Francois Gelis (IPhT)
    15/05/2012 14:30
  21. 19. Jet evolution in the QGP
    Dr Yacine Mehtar-Tani (IPhT)
    15/05/2012 15:10
    We study the perturbative evolution of a jet via multiple gluon emissions induced by the interactions between the jet constituents and a dense QCD medium like a quark-gluon plasma. We focus on the typical medium-induced gluon emissions, for which the gluon formation time is much smaller than the overall size of the medium. We show that the typical time between two subsequent emissions is...
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  22. 2. Thermalization in scalar field theories
    M. Thomas Epelbaum (IPhT)
    15/05/2012 15:35
    The quark gluon plasma thermalization in heavy ion collisions is an open problem that gave rise to many works in recent years. One of the approaches developped to study this QCD non pertubative problem is a resummation scheme that amounts to averaging over classical fields with random initial conditions. Its numerical implementation is presented here in the case of a scalar field theory with a...
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  23. 12. Symmetries and currents of the ideal and the unitary Fermi gases
    elisa meunier (LMPT)
    15/05/2012 16:00
    The maximal algebra of symmetries of the free Schrodinger equation is determined. This algebra is an infinite dimensional extension of the Schrodinger algebra (by higher symmetries which are not kinematical transformations), it is isomorphic to the Weyl algebra of quantum observables, and it may be interpreted as a non-relativistic higher-spin algebra. The associated infinite collection of...
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  24. 14. Physics beyond the Standard Model (review talk)
    Dr Emilian Dudas (Ecole Polytechnique)
    16/05/2012 09:30
  25. 26. LHC phenomenology of general SU(2)xSU(2)xU(1) models
    M. Tomas Jezo (LPSC)
    16/05/2012 10:10
    General SU(2)xSU(2)xU(1) models represent a well-motivated intermediate step towards the unification of the Standard Model gauge groups. Based on a recent global analysis of low-energy and LEP constraints of these models, we perform numerical scans of their various signals at the LHC. We show that total cross sections for lepton and third-generation quark pairs, while experimentally easily...
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  26. 45. Ultraviolet clues from infrared fingerprints
    M. Alfredo Urbano (Department of Physics and INFN, University of Salento)
    16/05/2012 10:35
  27. 20. Baryon and lepton number violation at the LHC
    Dr Christopher Smith (IPN Lyon)
    16/05/2012 11:30
    Baryon (B) and lepton (L) numbers are conserved in the standard model lagrangian, but generally not in new physics models. In this talk, we adopt an effective approach to analyze, in a model-independent way, the possible signatures of B and L violating interactions at the LHC. Then, we particularize the discussion to the minimal supersymmetric standard model, where such interactions may now be...
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  28. 4. Unlocking the Standard Model : the 1-generation case
    Dr Bruno Machet (CNRS)
    16/05/2012 11:55
    I show that the Standard Model of weak interactions cannot have less than two Higgs doublets as soon as they are considered (to transform) as $\bar q_i q_j$ and $\bar q_i \gamma_5 q_j$ bilinears. There are exactly two for one generation of quarks, which is the simple case under scrutiny here. All basic physical properties, not only of massive gauge bosons, but also of fermions and J=0 mesons...
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  29. 54. Indirect dark matter signals and backgrounds in cosmological simulations
    Dr Emmanuel NEZRI (LAM CNRS)
    16/05/2012 12:20
  30. 15. QCD in hadron collisions (review talk)
    Dr Gavin Salam (LPTHE Jussieu)
    16/05/2012 14:30
  31. 47. Model independent view of $b \to s l^- l^+$
    Dr Nejc Kosnik (Laboratoire de l'accelerateur lineaire)
    16/05/2012 15:10
    We discuss the advantages of combining the experimental bound on B(Bs->mu+ mu-) and the measured B(B->Kl+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 also emphasize the...
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  32. 7. Reconstruction of non-analytic functions
    Dr David GREYNAT (Fisica Teorica - Uni. de Zaragoza)
    16/05/2012 15:35
    With the help of the Mellin-Barnes transform, we show how to simultaneously resum the expansion of any kind of non-analytic functions around 0, 1 and $ infinity$ in a systematic way. We exemplify the method for the perturbative vector, axial scalar and pseudo-scalar correlator at $\mathcal{O}(\alpha_s^{3})$. We show that the coefficients, $\Omega(n)$, of the Taylor expansion of the vacuum...
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  33. 50. Strong coupling constant from first principles
    Konstantin Petrov (LAL)
    16/05/2012 16:00