A neutrino mass model with hidden $U(1)$ gauge symmetry

Abstract

We propose a realisation of inverse seesaw model controlled by hidden $U(1)$ gauge symmetry, and discuss the impact of a bosonic dark matter (DM) candidate by imposing a $Z_2$ parity. We present the detail of scalar spectra and apply the Casas-Ibarra parametrisation to fit the neutrino oscillation data. For this model, the allowed region is extracted to explain the observed relic density and the muon $g-2$ discrepancy, satisfying flavor constraints with DM involved. We interpret the DM annihilation into $\bar{f}f$ including all SM charged fermions and investigate the direct detection to place the bound on DM-Higgs coupling. Finally the LHC DM production is explored in light of charged lepton pair signature plus missing transverse energy.

arXiv comment26 pages, 7 figures and 2 tables; v2 text is expanded with scalar spectra, neutrino parametrisation and bound from DM direct detection; v3 corrected the top quark contribution; v4 final version accepted by Nuclear Physics B

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