Higgs portal dark matter in the minimal gauged $U(1)_{B-L}$ model

TL;DR

This paper presents a Higgs portal dark matter model within the minimal gauged $U(1)_{B-L}$ framework, where right-handed neutrinos are stabilized by a parity, and their relic abundance can match observations via Higgs resonance, with testable direct detection signals.

Contribution

It introduces a novel parity mechanism for stabilizing right-handed neutrino dark matter in the $U(1)_{B-L}$ model and demonstrates its viability through relic abundance and detection prospects.

Findings

Relic abundance matches observed dark matter density via Higgs resonance.

Predicted nucleon cross section is within reach of future experiments.

Model provides a testable Higgs portal dark matter scenario.

Abstract

We propose a scenario of the right-handed neutrino dark matter in the context of the minimal gauged $U(1)_{B-L}$ model by introducing an additional parity which ensures the stability of dark matter particle. The annihilation of this right-handed neutrino takes place dominantly through the s-channel Higgs boson exchange, so that this model can be called Higgs portal dark matter model. We show that the thermal relic abundance of the right-handed neutrino dark matter with help of Higgs resonance can match the observed dark matter abundance. In addition we estimate the cross section with nucleon and show that the next generation direct dark matter search experiments can explore this model.