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arXiv · 1301.7536

Axino dark matter with R-parity violation and 130 GeV gamma-ray line

Motoi Endo·Koichi Hamaguchi·Seng Pei Liew·Kyohei Mukaida·Kazunori Nakayama
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Abstract

We show that decaying axino dark matter with R-parity violation can explain the observed excess of the 130GeV gamma-ray line from the Galactic center in the Fermi data. The branching fraction of the axino decay into monochromatic photons can be O(1), and constraints from continuum gamma-rays and the anti-proton flux are ameliorated. The Peccei-Quinn scale of $O(10^{13}-10^{14})$\,GeV and the R-parity violation parameter of $O(10^{-12}-10^{-11})$ are cosmologically favored.

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Motoi Endo, Koichi Hamaguchi, Seng Pei Liew, Kyohei Mukaida, Kazunori Nakayama. 2013-03-27. Axino dark matter with R-parity violation and 130 GeV gamma-ray line. https://doi.org/10.1016/j.physletb.2013.03.008

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