Multicomponent dark matter in extended $U(1)_{B-L}$: neutrino mass and high scale validity
Abstract
Standard Model with right handed neutrinos charged under additional gauge symmetry offer solutions to both dark matter (DM) problem and neutrino mass generation, although constrained severely from relic density, direct search and Higgs vacuum stability. We therefore investigate a multicomponent DM scenario augmented by an extra inert scalar doublet, that is neutral under , which aids to enlarge parameter space allowed by DM constraints and Higgs vacuum stability. The lightest right-handed neutrino and the -even inert scalar are taken as the dark matter candidates and constitute a two component dark matter framework as they are rendered stable by an unbroken symmetry. DM-DM conversion processes turn out crucial to render requisite relic abundance in mass regions of the RH neutrino that do not appear in the stand-alone scenario. In addition, the one-loop renormalisation group (RG) equations in this model demonstrate that the electroweak (EW) vacuum can be stabilised till GeV in a parameter region compatible with the observed relic, the direct detection bound and other relevant constraints.
Keywords
Cite
@article{arxiv.1910.00612,
title = {Multicomponent dark matter in extended $U(1)_{B-L}$: neutrino mass and high scale validity},
author = {Subhaditya Bhattacharya and Nabarun Chakrabarty and Rishav Roshan and Arunansu Sil},
journal= {arXiv preprint arXiv:1910.00612},
year = {2020}
}
Comments
23 pages + appendices + references, 18 captioned figures, 3 tables, version published in JCAP