Radiative Dirac neutrino masses and dark matter in a $U(1)_{B-L}$ extended model

TL;DR

This paper presents a $U(1)_{B-L}$ extended model where Dirac neutrino masses are generated radiatively, linking neutrino mass origin with dark matter stability, and explores collider signatures and phenomenology of the dark sector.

Contribution

It introduces a novel $U(1)_{B-L}$ model that connects neutrino mass generation with dark matter stability via a residual $Z_6$ symmetry, and analyzes its phenomenological implications.

Findings

Dark matter candidates can be observed at colliders with lower luminosity

Model successfully explains neutrino masses and dark matter relic density

Collider signatures show promising detection prospects

Abstract

We study a $U(1)_{B-L}$ extension of the Standard Model (SM) in which Dirac neutrino masses are generated radiatively at the one-loop level through the exchange of new beyond the SM fields. This framework establishes a direct connection between neutrino mass generation and the dark sector, with the stability of the dark matter ensured by a residual discrete $Z_6$ symmetry arising from the spontaneous breaking of $U(1)_{B-L}$. We investigate the resulting charged lepton flavor violating processes and dark matter phenomenology, saturating relic observations and direct-detection constraints, and analyze the collider signatures of the dark sector at the Large Hadron Collider and at a future muon collider. We have identified excellent prospects for observing the considered dark matter candidates in these colliders, even with lower integrated luminosities than the proposed one.