X-ray line signal from 7 keV axino dark matter decay
High Energy Physics - Phenomenology
2018-01-17 v2 Cosmology and Nongalactic Astrophysics
Astrophysics of Galaxies
High Energy Astrophysical Phenomena
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.
Cite
@article{arxiv.1403.1536,
title = {X-ray line signal from 7 keV axino dark matter decay},
author = {Kyoungchul Kong and Jong-Chul Park and Seong Chan Park},
journal= {arXiv preprint arXiv:1403.1536},
year = {2018}
}
Comments
9 pages, 1 figure; discussion on BICEP2 result and references added, typos corrected; published in PLB