Bosonic super-WIMPs as keV-scale dark matter

Maxim Pospelov, Adam Ritz, and Mikhail Voloshin
Phys. Rev. D 78, 115012 – Published 16 December 2008

Abstract

We consider models of light superweakly interacting cold dark matter, with O(10100)keV mass, focusing on bosonic candidates such as pseudoscalars and vectors. We analyze the cosmological abundance, the γ 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(105).

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  • Received 15 August 2008

DOI:https://doi.org/10.1103/PhysRevD.78.115012

©2008 American Physical Society

Authors & Affiliations

Maxim Pospelov1,2, Adam Ritz1, and Mikhail Voloshin3,4

  • 1Department of Physics and Astronomy, University of Victoria, Victoria, British Colombia, V8P 1A1 Canada
  • 2Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2J 2W9, Canada
  • 3William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 4Institute of Theoretical and Experimental Physics, Moscow, 117218, Russia

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Issue

Vol. 78, Iss. 11 — 1 December 2008

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