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Gravity-mediated dark matter in clockwork/linear dilaton extra-dimensions

AuthorsFolgado, M.G.; Donini, Andrea ; Rius, Nuria
Issue DateApr-2020
PublisherInstitute of Physics Publishing
CitationJournal of High Energy Physics 2020 (4): 036 (2020)
AbstractWe study for the first time the possibility that Dark Matter (represented by particles with spin 0, 1/2 or 1) interacts gravitationally with Standard Model particles in an extra-dimensional Clockwork/Linear Dilaton model. We assume that both, the Dark Matter and the Standard Model, are localized in the IR-brane and only interact via gravitational mediators, namely the Kaluza-Klein (KK) graviton and the radion/KK-dilaton modes. We analyse in detail the Dark Matter annihilation channel into Standard Model particles and into two on-shell Kaluza-Klein towers (either two KK-gravitons, or two radion/KK- dilatons, or one of each), finding that it is possible to obtain the observed relic abundance via thermal freeze-out for Dark Matter masses in the range m ∈ [1, 15] TeV for a 5- dimensional gravitational scale M ranging from 5 to a few hundreds of TeV, even after taking into account the bounds from LHC Run II and irrespectively of the DM particle spin.
Publisher version (URL)http://dx.doi.org/10.1007/JHEP04(2020)036
Identifiersdoi: 10.1007/JHEP04(2020)036
issn: 1029-8479
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