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arXiv · 1403.1536

X-ray line signal from 7 keV axino dark matter decay

Kyoungchul Kong·Jong-Chul Park·Seong Chan Park
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Abstract

Recently a weak X-ray emission around E ~ 3.5 keV was 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. Moreover, most of parameter space is consistent with recent observation by the BICEP2 experiment.

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Kyoungchul Kong, Jong-Chul Park, Seong Chan Park. 2014-03-06. X-ray line signal from 7 keV axino dark matter decay. https://doi.org/10.1016/j.physletb.2014.04.037

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