Gravity-mediated scalar Dark Matter in warped extra-dimensions

Journal of High Energy Physics

Miguel G. Folgado¹  Andrea Donini¹  Nuria Rius¹ 

[1] Departamento de Física Teórica and IFIC, Universidad de Valencia-CSIC, C/ Catedrático José Beltrán, 2, E-46980, Paterna, Spain;

关键词: Phenomenology of Field Theories in Higher Dimensions;   

DOI  :  10.1007/JHEP01(2020)161

来源: Springer

【 摘 要 】

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.

【 授权许可】

Unknown