Neutrino and $Z^{\prime }$ phenomenology in an anomaly-free $\mathbf{U}(1)$ extension: role of higher-dimensional operators

Abstract

We consider an anomaly-free $\mathrm{U}(1)$ extension of the Standard Model with three right-handed neutrinos (RHNs) and two complex scalars, wherein the charge assignments preclude all tree-level mass terms for the neutrinos. Considering this setup, in turn, to be only a low-energy effective theory, we introduce higher-dimensional terms {\em a la} Froggatt-Nielsen to naturally generate tiny neutrino masses. One of the RHNs turns out to be very light, thereby constituting the main decay mode for the $Z^{\prime }$ and hence relaxing the LHC dilepton resonance search constraints. This very RHN has a lifetime comparable to or bigger than the age of the Universe, and, hence, could account for a non-negligible fraction of the dark matter.

References in corpus (10)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• From the trees to the forest: a review of radiative neutrino mass models
• Low scale B-L extension of the Standard Model at the LHC
• Signatures for right-handed neutrinos at the Large Hadron Collider
• Limits on the Radiative Decay of Sterile Neutrino Dark Matter from the Unresolved Cosmic and Soft X-ray Backgrounds
• Neutrino Mass, Dark Matter and Anomalous Magnetic Moment of Muon in a $U(1{)}_{L_{\mu }-L_{\tau }}$ Model
• Flavour Dependent Gauged Radiative Neutrino Mass Model
• Pure Leptonic Gauge Symmetry, Neutrino Masses and Dark Matter
• Flavon Inflation
• Quark-Lepton Connections in $Z^{\prime }$ Mediated FCNC Processes: Gauge Anomaly Cancellations at Work

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• Testing left-right symmetry with an inverse seesaw mechanism at the LHC
• Neutrino Floor in Leptophilic $U(1)$ Models: Modification in $U(1{)}_{L_{\mu }-L_{\tau }}$
• Search for the $Z^{\prime }$ boson decaying to a right-handed neutrino pair in leptophobic $\mathrm{U}(1)$ models
• Dynamical scoto-seesaw mechanism with gauged $B-L$
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• The Genuine Type-V Seesaw Model: Phenomenological Introduction
• Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables
• Indian Contributions to LHC Theory
• Charged Higgs induced 5 and 6 lepton signatures from heavy neutrinos at the LHC