Neutrinophilic two Higgs doublet model with dark matter under an alternative $U(1)_{B-L}$ gauge symmetry

TL;DR

This paper introduces a neutrinophilic two Higgs doublet model with an alternative $U(1)_{B-L}$ gauge symmetry, proposing a dark matter candidate stabilized by gauge charge and analyzing its relic density under collider constraints.

Contribution

It presents a novel $U(1)_{B-L}$ extension that stabilizes dark matter without extra symmetries and explores neutrino mass generation within this framework.

Findings

Dark matter stability achieved via gauge charge assignment.

Relic density consistent with collider constraints.

Model accommodates Dirac neutrinos with rank two mass matrix.

Abstract

We propose Dirac type active neutrino with rank two mass matrix and a Majorana fermion dark matter candidate with an alternative local $U(1)_{B-L}$ extension of neutrinophilic two Higgs doublet model. Our dark matter candidate can be stabilized due to charge assignment under the gauge symmetry without imposing extra discrete $Z_2$ symmetry and the relic density is obtained from $Z'$ boson exchanging process. Taking into account collider constraints on $Z'$ boson mass and coupling, we estimate the relic density.