6533b854fe1ef96bd12aec2c
RESEARCH PRODUCT
Gravity-mediated Scalar Dark Matter in Warped Extra-Dimensions
Miguel G. FolgadoAndrea DoniniNuria Riussubject
PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Nuclear and High Energy PhysicsParticle physicsPhysics::General PhysicsLarge Hadron Collider010308 nuclear & particles physicsDark matterScalar (mathematics)GravitonFOS: Physical sciences01 natural sciencesStandard ModelGravitationExtra dimensionsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesPhenomenology of Field Theories in Higher Dimensionslcsh:QC770-798lcsh:Nuclear and particle physics. Atomic energy. RadioactivityBrane010306 general physicsAstrophysics - High Energy Astrophysical Phenomenadescription
We revisit the case of scalar dark matter interacting just gravitationally with the Standard Model (SM) particles in an extra-dimensional Randall-Sundrum scenario. We assume that both, the dark matter and the Standard Model, are localized in the TeV brane and only interact via gravitational mediators, namely the graviton Kaluza-Klein modes and the radion. We analyze in detail the dark matter annihilation channel into two on-shell KK-gravitons, and contrary to previous studies which overlooked this process, we find that it is possible to obtain the correct relic abundance for dark matter masses in the range [1, 10] TeV even after taking into account the strong bounds from LHC Run II. We also consider the impact of the radion contribution (virtual exchange leading to SM final states as well as on-shell production), which does not significantly change our results. Quite interestingly, a sizeable part of the currently allowed parameter space could be tested by LHC Run III and by the High-Luminosity LHC.
year | journal | country | edition | language |
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2020-01-27 |