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

Jong Chul Park, Kyoungchul Kong, Seong Chan Park

Research output: Contribution to journalArticle

57 Citations (Scopus)


Recently a weak X-ray emission around ≃ 3.5keV 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 2 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.

Original languageEnglish
Pages (from-to)217-220
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2014 Jun 2


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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