Showing 2012 · hep-phShow all

17 papers · 2 filters

hep-ph2012★ 16 cited

Higgs diphoton rate enhancement from supersymmetric physics beyond the MSSM

Marcus Berg, Igor Buchberger, D. M. Ghilencea +1

We show that supersymmetric "new physics" beyond the MSSM can naturally accommodate a Higgs mass near 126 GeV and enhance the signal rate in the Higgs to diphoton channel, while th…

hep-ph2012★ 71 cited

Leptogenesis: beyond the minimal type I seesaw scenario

Thomas Hambye

Numerous recent evidences for neutrino masses have established the leptogenesis mechanism as a very natural possible explanation for the baryon asymmetry of the Universe. The expli…

hep-ph2012★ 180 cited

Predictive Model for Radiatively Induced Neutrino Masses and Mixings with Dark Matter

Michael Gustafsson, Jose Miguel No, Maximiliano A. Rivera

A minimal extension of the standard model to naturally generate small neutrino masses and provide a dark matter candidate is proposed. The dark matter particle is part of a new sca…

hep-ph2012★ 82 cited

Non-thermal Dark Matter Production from the Electroweak Phase Transition: Multi-TeV WIMPs and "Baby-Zillas"

Adam Falkowski, Jose Miguel No

Particle production at the end of a first-order electroweak phase transition may be rather generic in theories beyond the standard model. Dark matter may then be abundantly produce…

hep-ph2012★ 41 cited

Low Scale Supersymmetry Breaking and its LHC Signatures

Emilian Dudas, Christoffer Petersson, Pantelis Tziveloglou

We study the most general extension of the MSSM Lagrangian that includes scenarios in which supersymmetry is spontaneously broken at a low scale f. The spurion that parametrizes su…

hep-ph2012★ 84 cited

Energy reconstruction effects in neutrino oscillation experiments and implications for the analysis

M. Martini, M. Ericson, G. Chanfray

Data on neutrino oscillation often involve reconstructed neutrino energies while the analysis implies the real neutrino energy. The corrections corresponding to the transformation…

hep-ph2012★ 20 cited

Liberating Higgs couplings in supersymmetry

Christoffer Petersson, Alberto Romagnoni, Riccardo Torre

In the MSSM, the Higgs couplings to down-type quarks and leptons, normalized with respect to their corresponding Standard Model values, coincide at tree-level and this degeneracy i…

hep-ph2012★ 9 cited

QCD analysis of Lambda hyperon production in DIS target-fragmentation region

Federico Alberto Ceccopieri, Davide Mancusi

We consider Lambda-hyperon production in the target-fragmentation region of semi-inclusive deep-inelastic scattering within the framework of fracture functions. We present a first…

hep-ph2012★ 203 cited

Muon conversion to electron in nuclei in type-I seesaw models

Rodrigo Alonso, Mikael Dhen, Belen Gavela +1

We compute the muon to electron conversion in the type-I seesaw model, as a function of the right-handed neutrino mixings and masses. The results are compared with previous computa…

hep-ph2012★ 34 cited

Complementarity of Galactic radio and collider data in constraining WIMP dark matter models

Yann Mambrini, Michel H. G. Tytgat, Gabrijela Zaharijas +1

In this work we confront dark matter models to constraints that may be derived from radio synchrotron radiation from the Galaxy, taking into account the astrophysical uncertainties…

hep-ph2012★ 77 cited

What if Dark Matter Gamma-Ray Lines come with Gluon Lines?

Xiaoyong Chu, Thomas Hambye, Tiziana Scarna +1

In dark matter (DM) models, the production of a gamma line (or of a "box-shaped" gamma-ray spectrum) from DM annihilation proceeds in general from a loop diagram involving a heavy…

hep-ph2012★ 5 cited

Tame D-tadpoles in gauge mediation

Riccardo Argurio, Diego Redigolo

We revisit models of gauge mediated supersymmetry breaking where messenger parity is violated. Such a symmetry is usually invoked in order to set to zero potentially dangerous hype…

hep-ph2012★ 165 cited

Status of the Inert Doublet Model and the Role of multileptons at the LHC

Michael Gustafsson, Sara Rydbeck, Laura Lopez-Honorez +1

A possible feature of the inert doublet model (IDM) is to provide a dark matter candidate together with an alteration of both direct and indirect collider constraints that allow fo…

hep-ph2012★ 43 cited

Revisiting the T2K data using different models for the neutrino-nucleus cross sections

D. Meloni, M. Martini

We present a three-flavour fit to the recent νμ--> νe and νμ--> νμT2K oscillation data with different models for the neutrino-nucleus cross section. We show that, even for a limite…

hep-ph2012★ 114 cited

Neutrino energy reconstruction problems and neutrino oscillations

M. Martini, M. Ericson, G. Chanfray

We discuss the accuracy of the usual procedure for neutrino energy reconstruction which is based on the quasielastic kinematics. Our results are described in terms of a probability…

hep-ph2012

Is the Lorentz limiting speed equal to the Speed of Light? Photons vs Neutrino tests

Jean-Marie Frere, Simon Mollet, Michel H. G. Tytgat

We discuss the possibility that the limiting speed (c_l) appearing in Lorentz equations might be different i.e., slightly larger than the observed speed of light (c_n). We show tha…

hep-ph2012★ 4 cited

CP, T and fundamental interactions

J-M. Frère

We discuss the importance of the CP (simultaneous particle-antiparticle and left-right permutation) and T (time reversal) symmetries in the context of fundamental interactions. We…