$\nu_R$ dark matter-philic Higgs for 3.5 keV X-ray signal
High Energy Physics - Phenomenology
2015-02-24 v3 High Energy Astrophysical Phenomena
High Energy Physics - Experiment
Abstract
We suggest a new model of 7 keV right-handed neutrino dark matter inspired by a recent observation of 3.5 keV X-ray line signal in the XMM-Newton observatory. It is difficult to derive the tiny masses with a suitable left-right mixing of the neutrino in a framework of ordinary simple type-I seesaw mechanism. We introduce a new Higgs boson, a dark matter-philic Higgs boson, in which the smallness of its vacuum expectation value can be achieved. We investigate suitable parameter regions where the observed dark matter properties are satisfied. We find that the vacuum expectation value of dark matter-philic Higgs boson should be about 0.17 GeV.
Keywords
Cite
@article{arxiv.1407.6827,
title = {$\nu_R$ dark matter-philic Higgs for 3.5 keV X-ray signal},
author = {Naoyuki Haba and Hiroyuki Ishida and Ryo Takahashi},
journal= {arXiv preprint arXiv:1407.6827},
year = {2015}
}
Comments
10 pages, 1 figure, v2:references added, minor changes, v3:published version