6533b857fe1ef96bd12b511d
RESEARCH PRODUCT
Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments
Jong Soo KimFrancesca CaloreRoberto TrottaChristoph WenigerRoberto Ruiz De AustriGianfranco BertoneSascha Caronsubject
supersymmetry and cosmologyParticle physicsMilky WayAstrophysics::High Energy Astrophysical PhenomenaDark matterFOS: Physical sciencesgamma ray experiments7. Clean energy01 natural sciences0202 Atomic Molecular Nuclear Particle And Plasma PhysicsHigh Energy Physics - Phenomenology (hep-ph)Settore FIS/05 - Astronomia e Astrofisica0103 physical sciencesHigh Energy Physics010306 general physicsGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)PhysicsAnnihilationLarge Hadron Colliderdark matter detectorsdark matter theory010308 nuclear & particles physicsBranching fractionHigh Energy Physics::Phenomenologyhep-phAstronomy and AstrophysicsNuclear & Particles Physics0201 Astronomical And Space SciencesHigh Energy Physics - Phenomenology13. Climate actionExperimental High Energy PhysicsHigh Energy Physics::ExperimentHaloFermi Gamma-ray Space TelescopeMinimal Supersymmetric Standard Modeldescription
We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that comply with all the latest experimental results from dark matter indirect, direct and accelerator dark matter searches. We show that the model provides a satisfactory explanation of the excess of gamma-rays from the Galactic centre observed by the Fermi~Large Area Telescope, assuming that it is produced by the annihilation of neutralinos in the Milky Way halo. We identify two regions that pass all the constraints: the first corresponds to neutralinos with a mass ~80-100 GeV annihilating into WW with a branching ratio of 95% ; the second to heavier neutralinos, with mass ~180-200 GeV annihilating into t tbar with a branching ratio of 87%. We show that neutralinos compatible with the Galactic centre GeV excess will soon be within the reach of LHC run-II -- notably through searches for charginos and neutralinos, squarks and light smuons -- and of Xenon1T, thanks to its unprecedented sensitivity to spin-dependent cross-section off neutrons.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-04-01 |