http://arxiv.org/abs/1403.1536
Recently a weak X-ray emission around E ~ 3.5 keV is detected in the Andromeda galaxy and various galaxy clusters including the Perseus galaxy cluster but its source has been unidentified. Axino, the superpartner of axion, with a mass 2E is suggested as a possible origin of the line with R-parity violating decay into photon and neutrino.
K. Kong, J. Park and S. Park
Fri, 7 Mar 14
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