Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 7, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2013/07/006
Keywords
dark matter theory; cosmology of theories beyond the SM
Funding
- ERC starting grant Cosmo(C)LHC [204072]
- U. S. Department of Energy [DE-FG-02-95ER40896]
- NSF [PHY-0970171, 1066293]
- European Research Council (ERC) under the EU Seventh Framework Programme (FP7) / ERC Starting Grant [278234]
- European Research Council (ERC) [204072] Funding Source: European Research Council (ERC)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0970171] Funding Source: National Science Foundation
- ICREA Funding Source: Custom
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Lines in the energy spectrum of gamma rays are a fascinating experimental signal, which are often considered smoking gun evidence of dark matter annihilation. The current generation of gamma ray observatories are currently closing in on parameter space of great interest in the context of dark matter which is a thermal relic. We consider theories in which the dark matter's primary connection to the Standard Model is via the top quark, realizing strong gamma ray lines consistent with a thermal relic through the forbidden channel mechanism proposed in the Higgs in Space Model. We consider realistic UV-completions of the Higgs in Space and related theories, and show that a rich structure of observable gamma ray lines is consistent with a thermal relic as well as constraints from dark matter searches and the LHC. Particular attention is paid to the one loop contributions to the continuum gamma rays, which can easily swamp the line signals in some cases, and have been largely overlooked in previous literature.
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