Singlet fermion Dark Matter within Left-Right Model

TL;DR

This paper explores a left-right symmetric model with a singlet fermion as dark matter, interacting via new gauge bosons, and discusses its implications for relic density and collider detection.

Contribution

It introduces a novel singlet fermion dark matter candidate within a left-right symmetric framework with baryon and lepton gauge symmetries, linking dark matter properties to TeV-scale gauge bosons.

Findings

Dark matter candidate has a mass of a few hundred GeV.

Couples to TeV-scale gauge bosons to produce correct relic density.

Model predicts new gauge bosons accessible at the LHC.

Abstract

We discuss singlet fermion dark matter within a left-right symmetric model promoting baryon and lepton numbers as separate gauge symmetries. We add a simple Dirac fermionic dark matter singlet under $SU(2)_{L,R}$ with nonzero and equal baryon and lepton number which ensures electric charge neutrality. Such a dark matter candidate interacts with SM particles through the extra $Z_{B,\ell}$ gauge bosons. This can give rise to a dark matter particle of a few hundred GeV that couples to $\sim$ TeV scale gauge bosons to give the correct relic density. This model thus accommodates TeV scale $Z_{B,\ell}$ gauge bosons and other low scale BSM particles, which can be easily probed at LHC.