Gravity-mediated (or composite) Dark Matter confronts astrophysical data

Lee, Hyun Min, Park, Myeonghun and Sanz, Veronica (2014) Gravity-mediated (or composite) Dark Matter confronts astrophysical data. Journal of High Energy Physics, 2014 (5). a63. ISSN 1126-6708

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Abstract

We consider the astrophysical bounds on a new form of dark matter, the so called Gravity-mediated Dark Matter. In this scenario, dark matter communicates with us through a mediator sector composed of gravitational resonances, namely a new scalar (radion) and a massive spin-two resonance (massive graviton). We consider specific models motivated by natural electroweak symmetry breaking or weak-scale dark matter in the context of models in warped extra-dimensions and their composite duals. The main Dark Matter annihilation mechanism is due to the interactions of KK gravitons to gauge bosons that propagate in bulk. We impose the bounds on monochromatic or continuum photons from Fermi-LAT and HESS. We also explore scenarios in which the Fermi gamma-ray line could be a manifestation of Gravity-mediated Dark Matter.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Theoretical Particle Physics Research Group
Subjects: Q Science > QB Astronomy
Depositing User: Billy Wichaidit
Date Deposited: 26 Jul 2017 11:09
Last Modified: 26 Jul 2017 12:00
URI: http://sro.sussex.ac.uk/id/eprint/69447

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Project NameSussex Project NumberFunderFunder Ref
Particle Physics Theory at Royal Holloway and SussexG0742STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/J000477/1