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

2014/03/31 by Kyoungchul Kong, Jong-Chul Park, Seong Chan Park · 79 citations
Physics and Astronomy · #Andromeda Galaxy #Astronomy #Astrophysics #Atomic and Subatomic Physics Research #Axion #Dark Matter and Cosmic Phenomena #Dark matter #Galaxy #Milky Way #Neutrino #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Superpartner #astro-ph.CO #astro-ph.GA #astro-ph.HE #hep-ph

paper · pdf · doi:10.1016/j.physletb.2014.04.037

published in Physics Letters B 733, 217-220 (Elsevier BV) · 9 pages, 1 figure; discussion on BICEP2 result and references added, typos corrected; published in PLB

openalex publication_date 2014/04/24 · arxiv created 2014/05/19 · openalex created_date 2016/06/24 · arxiv updated 2018/01/17 · openalex updated_date 2026/08/05

Abstract

Recently a weak X-ray emission around Eγ≃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 2Eγ 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.

Citations

• Kaluza-Klein Effects on Higgs Physics in Universal Extra Dimensions
• The very low energy solar flux of electron and heavy-flavor neutrinos and antineutrinos
• The inner structure of haloes in cold+warm dark matter models
• The Low-Energy Frontier of Particle Physics

Cited by

• X-Ray Lines from Dark Matter Annihilation at the keV Scale
• Light axinos from freeze-in: production processes, phase space distributions, and Ly-α forest constraints