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We consider simplified dark matter models (DM) interacting gravitationallywith the standard model (SM) particles in a Randall-Sundrum (RS) framework. Inthis framework, the DM particles interact through the exchange of spin-2Kaluza-Klein (KK) gravitons in the $s$-channel with the SM particles. Theparameter space of the RS model with universal couplings to SM particles isknown to be strongly constrained from the LHC data. We are thus led to considermodels with non-universal couplings. The first model we consider in this studyis a top-philic graviton model in which only the right-handed top quarks aretaken to interact strongly with the gravitons. In the second, the lepto-philicmodel, we assume that only the right-handed charged leptons interact stronglywith the gravitons. We extend the study to include not only the scalar, vectorand spin-1/2 fermions but also spin-3/2 fermionic dark matter. We find thatthere is a large parameter space in these benchmark models where it is possibleto achieve the observed relic density consistent with the direct and indirectsearches and yet not to be constrained from the LHC data.

Dark matter in the Randall-Sundrum model with non-universal coupling