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arXiv · 1404.4795

3.55 keV X-ray Line Signal from Excited Dark Matter in Radiative Neutrino Model

Hiroshi Okada·Takashi Toma
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Abstract

We study an exciting dark matter scenario in a radiative neutrino model to explain the X-ray line signal at $3.55$ keV recently reported by XMN-Newton X-ray observatory using data of various galaxy clusters and Andromeda galaxy. We show that the required large cross section for the up-scattering process to explain the X-ray line can be obtained via the resonance of the pseudo-scalar. Moreover this model can be compatible with the thermal production of dark matter and the constraint from the direct detection experiment.

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Hiroshi Okada, Takashi Toma. 2014-09-03. 3.55 keV X-ray Line Signal from Excited Dark Matter in Radiative Neutrino Model. https://doi.org/10.1016/j.physletb.2014.08.046

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