Enhancement of the Higgs decay into a $Z^{\prime }$ pair in models with $U(1{)}_X$ gauge symmetry

Abstract

We discuss the Higgs phenomenology in models with a new $U(1{)}_X$ gauge symmetry including the $U(1{)}_{B-L}$ scenario, where three right-handed neutrinos are inevitably introduced due to the gauge anomaly cancellations. We find that the decay branching ratio of the discovered Higgs boson into a pair of new massive gauge bosons ($Z^{\prime }$) can significantly be enhanced in the Dirac neutrino case as compared with the Majorana case for a fixed value of the new gauge coupling and the mass of $Z^{\prime }$ under constraints from current experimental data. Because of such an enhancement, the Dirac case can indirectly be discriminated from the Majorana case via the Higgs decay.

6 pages, 4 figures. Version accepted for publication in Phys. Lett. B

References in corpus (4)

• A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Higgs boson production cross-section measurements and their EFT interpretation in the $4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Cited by in corpus (1)

• Right handed neutrino production from $Z^{\prime }$ interactions in forward search experiments