Phenomenology of the gauge symmetry for right-handed fermions

Abstract

In this paper we investigate the phenomenology of the U(1) gauge symmetry for right-handed fermions, where three right-handed neutrinos are introduced for anomalies cancellation. Constraints on the new gauge boson $Z_{\mathbf{R}}$ arising from $Z-Z^{\prime }$ mixing as well as the upper bound of $Z^{\prime }$ production cross section in di-lepton channel at the LHC are presented. We further study the neutrino mass generation and the phenomenology of $Z_{\mathbf{R}}$-portal dark matter in this model. The lightest right-handed neutrino can be the cold dark matter candidate stabilized by a $Z_2$ flavor symmetry. Our results show that active neutrino masses can be generated via the modified type-II seesaw mechanism; right-handed neutrino dark matter is available only for its mass at near the resonant regime of the SM Higgs and/or the new bosons; constraint from the dilepton search at the LHC is stronger than that from the $Z-Z^{\prime }$ mixing only for $g_{\mathbf{R}}<0.121$, where $g_{\mathbf{R}}$ is the new gauge coupling.

17 pages, 6 figures, more references added

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• Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model
• 17 MeV Atomki anomaly from short-distance structure of spacetime
• Atomki anomaly in gauged $U(1{)}_R$ symmetric model
• Direct detections of Majorana dark matter in vector portal
• Neutrino and dark matter in a gauged $U(1{)}_R$ symmetry
• Dirac dark matter, dark radiation, and the type-II seesaw mechanism in alternative $U(1{)}_X$ standard model