Majorana Dark matter with B+L gauge symmetry

TL;DR

This paper introduces a B+L gauge symmetry extension to the Standard Model, proposing a stable fermion as a dark matter candidate, and analyzes experimental constraints and viable parameter space for detection.

Contribution

It presents a novel B+L gauge symmetry model with a stable fermion dark matter candidate, analyzing experimental constraints and identifying viable detection prospects.

Findings

The fermion $$ can serve as a dark matter candidate.

Constraints from LUX significantly restrict the model parameters.

Viable parameter space remains for future experimental tests.

Abstract

We present a new model that extends the Standard Model (SM) with the local B+L symmetry, and point out that the lightest new fermion $\zeta$, introduced to cancel anomalies and stabilized automatically by the B+L symmetry, can serve as the cold dark matter candidate. We study constraints on the model from Higgs measurements, electroweak precision measurements as well as the relic density and direct detections of the dark matter. Numerical results reveal that the pseudo-vector coupling of $\zeta$ with $Z$ and the Yukawa coupling with the SM Higgs are highly constrained by the latest results of LUX, while there are viable parameter space that could satisfy all the constraints and give testable predictions.