Anomalous Magnetic Moment and Higgs Coupling of the Muon in a Sequential U(1) Gauge Model with Dark Matter

Abstract

We study an Abelian gauge extension of the standard model with fermion families having nonuniversal gauge charges. The gauge charges and scalar content are chosen in such an anomaly-free way that only the third generation fermions receive Dirac masses via renormalisable couplings with the Higgs boson. Incorporating additional vector like fermions and scalars with appropriate U (1) charges can lead to radiative Dirac masses of first two generations with neutral fermions going in the loop being dark matter candidates. Focusing on radiative muon mass, we constrain the model from the requirement of satisfying muon mass, recently measured muon anomalous magnetic moment by the E989 experiment at Fermilab along with other experimental bounds including the large hadron collider (LHC) limits. The anomalous Higgs coupling to muon is constrained from the LHC measurements of Higgs to dimuon decay. The singlet fermion dark matter phenomenology is discussed showing the importance of both annihilation and coannihilation effects. Incorporating all bounds lead to a constrained parameter space which can be probed at different experiments.

Heavy singly charged Higgs bosons and inverse seesaw neutrinos as origins of large $(g-2)_{e,μ}$ in two higgs doublet models

“…The conclusion is also true for the Minimal supersymmetric model MSSM [64][65][66]. As usual solution, there is a variety of extensions of THDM that successfully explain and accommodate the (g − 2) e,µ anomalies by adding new vector-like fermions as SU (2) L multiplets [38][39][40][41][42][43] as well as SU (2) L singlets of neutral and charged Higss bosons [54,56,[68][69][70][71]. Only few THDM models with scalar singlets and fermions can successfully explain the experimental data of both muon and electron anomalous magnetic moments [42,67,69].…”