6533b7d4fe1ef96bd1262a44
RESEARCH PRODUCT
Updated collider and direct detection constraints on Dark Matter models for the Galactic Center gamma-ray excess
Samuel J. WitteSamuel J. WitteMiguel EscuderoMiguel EscuderoDan HooperDan Hoopersubject
High Energy Astrophysical Phenomena (astro-ph.HE)PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Large Hadron ColliderAnnihilation010308 nuclear & particles physicsPhysics beyond the Standard ModelDark matterGalactic CenterFOS: Physical sciencesAstronomy and AstrophysicsFermion01 natural sciencesStandard ModelPseudoscalarHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesAstrophysics - High Energy Astrophysical Phenomena010306 general physicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
Utilizing an exhaustive set of simplified models, we revisit dark matter scenarios potentially capable of generating the observed Galactic Center gamma-ray excess, updating constraints from the LUX and PandaX-II experiments, as well as from the LHC and other colliders. We identify a variety of pseudoscalar mediated models that remain consistent with all constraints. In contrast, dark matter candidates which annihilate through a spin-1 mediator are ruled out by direct detection constraints unless the mass of the mediator is near an annihilation resonance, or the mediator has a purely vector coupling to the dark matter and a purely axial coupling to Standard Model fermions. All scenarios in which the dark matter annihilates through $t$-channel processes are now ruled out by a combination of the constraints from LUX/PandaX-II and the LHC.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-12-19 | Journal of Cosmology and Astroparticle Physics |