# Flavoured gauge extension of singlet-doublet fermionic dark matter: neutrino mass, high scale validity and collider signatures

## TL;DR

This paper introduces a gauged singlet-doublet fermionic dark matter model with an extended B-3L_tau symmetry, addressing neutrino masses, collider signatures, and high-scale stability, without ad-hoc symmetries.

## Contribution

It proposes a novel gauged fermionic dark matter model with anomaly cancellation and neutrino mass generation, enhancing detection prospects and high-scale validity.

## Key findings

- Model achieves anomaly cancellation with right-handed neutrinos.
- Dark matter stability is naturally ensured by gauge symmetry.
- Model remains valid up to the Planck scale with stable electroweak vacuum.

## Abstract

We propose an Abelian gauged version of the singlet-doublet fermionic dark matter (DM) model where DM, combination of a vector like fermion doublet and a fermion singlet, is naturally stabilised by the gauge symmetry without requiring any ad-hoc discrete symmetries. In order to have good detection prospects at collider experiments like the large hadron collider (LHC) and enlarged parameter space for low mass DM, we consider the additional gauge symmetry to be based on the quantum $B-3L_{\tau}$ where the restriction to third generation of leptons is chosen to have weaker bounds from the LHC on the corresponding gauge boson. The triangle anomalies arising in this model can be cancelled by including a right handed neutrino which takes part in generating light neutrino masses through type I seesaw mechanism. Apart from DM, collider prospects and light neutrino masses, the model also offers high scale validity giving rise to a stable electroweak vacuum and perturbative couplings all the way up to the Planck scale. We constrain our model parameters from these requirements as well as existing relevant constraints related to DM and colliders.