Gravity-mediated Dark Matter in Clockwork/Linear Dilaton Extra-Dimensions

Abstract

We 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 $m_{\mathrm{DM}}\in [1,15]$ TeV for a 5-dimensional gravitational scale $M_5$ 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.

26 pages, 6 figures. Published version. arXiv admin note: text overlap with arXiv:1907.04340

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• Non-minimally Coupled Vector Boson Dark Matter
• FIMP Dark Matter in Clockwork/Linear Dilaton Extra-Dimensions
• Probing some photon portals to new physics at intensity frontier experiments
• Probing hidden spin-2 mediator of dark matter with NA64e, LDMX, NA64$\mu$ and M${}^3$
• Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments
• Spin-dependence of Gravity-mediated Dark Matter in Warped Extra-Dimensions
• Gravitational SIMPs
• Revisiting Neutrino Masses In Clockwork Models