Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-21
Phys.Rev.D78:115012,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 3 figures; v2: explanatory remarks on axion absorption added and stellar bounds improved; v3: reference added; v4: s
Scientific paper
10.1103/PhysRevD.78.115012
We consider models of light super-weakly interacting cold dark matter, with O(10-100) keV mass, focusing on bosonic candidates such as pseudoscalars and vectors. We analyze the cosmological abundance, the gamma-background created by particle decays, the impact on stellar processes due to cooling, and the direct detection capabilities in order to identify classes of models that pass all the constraints. In certain models, variants of photoelectric (or axioelectric) absorption of dark matter in direct-detection experiments can provide a sensitivity to the superweak couplings to the Standard Model which is superior to all existing indirect constraints. In all models studied, the annual modulation of the direct-detection signal is at the currently unobservable level of O(10^{-5}).
Pospelov Maxim
Ritz Adam
Voloshin Mikhail B.
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