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Title

Higgs in space!

AuthorsTaoso, Marco CSIC; Jackson, C. B.; Servant, Géraldine; Shaughnessy, Gabe; Tait, Tim M. P.
KeywordsDark matter theory
Dark matter experiments
Gamma ray experiments
Cosmology of Theories beyond the SM
Issue Date6-Apr-2010
PublisherInstitute of Physics Publishing
CitationJournal of Cosmology and Astroparticle Physics (4): 004 (2010)
AbstractWe consider the possibility that the Higgs can be produced in dark matter annihilations, appearing as a line in the spectrum of gamma rays at an energy determined by the masses of the WIMP and the Higgs itself. We argue that this phenomenon occurs generally in models in which the the dark sector has large couplings to the most massive states of the SM and provide a simple example inspired by the Randall-Sundrum vision of dark matter, whose 4d dual corresponds to electroweak symmetry-breaking by strong dynamics which respect global symmetries that guarantee a stable WIMP. The dark matter is a Dirac fermion that couples to a Z' acting as a portal to the Standard Model through its strong coupling to top quarks. Annihilation into light standard model degrees of freedom is suppressed and generates a feeble continuum spectrum of gamma rays. Loops of top quarks mediate annihilation into gamma Z, gamma h, and gamma Z', providing a forest of lines in the spectrum. Such models can be probed by the Fermi/GLAST satellite and ground-based Air Cherenkov telescopes.
Publisher version (URL)http://dx.doi.org/ 10.1088/1475-7516/2010/04/004
URIhttp://hdl.handle.net/10261/24886
DOI10.1088/1475-7516/2010/04/004
ISSN1475-7516
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