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X-ray line signal from 7 keV axino dark matter decayopen access

Authors
Park, JC[Park, Jong-Chul]Kong, K[Kong, Kyoungchul]Park, SC[Park, Seong Chan]
Issue Date
2-Jun-2014
Publisher
ELSEVIER SCIENCE BV
Keywords
X-ray; Neutrino; Dark matter; key events; Axino; BICEP2
Citation
PHYSICS LETTERS B, v.733, pp.217 - 220
Indexed
SCIE
SCOPUS
Journal Title
PHYSICS LETTERS B
Volume
733
Start Page
217
End Page
220
URI
https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/52668
DOI
10.1016/j.physletb.2014.04.037
ISSN
0370-2693
Abstract
Recently a weak X-ray emission around E-gamma similar or equal to 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(gamma) 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. (C) 2014 The Authors. Published by Elsevier B.V.
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