http://arxiv.org/abs/1509.00673
Dark matter particles constitute $23\%$ of the total energy density of our universe and their exact properties are still unclear besides that they must be very cold and weakly interacting with the standard model particles. Many beyond standard model theories provide proper candidates to serve as the dark matter. The axions were introduced to solve the strong CP problem and later turned out to be a very attractive dark matter candidate. In this paper, we briefly review the physics of axions and the axion dark matter.
Q. Yang
Thu, 3 Sep 15
42/58
Comments: 10 pages, contribution to the special issue of the Modern Physics Letters A “Dark Matter Particle Candidates”
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