Unveiling neutrino phenomenology, $(g-2)_{e,\mu}$ and leptogenesis through U(1) gauge symmetries in an inverse seesaw model

TL;DR

This paper proposes an extended Standard Model with additional gauge symmetries to explain neutrino properties, $(g-2)$ anomalies, and matter-antimatter asymmetry, and discusses its testability in upcoming experiments.

Contribution

It introduces a novel inverse seesaw model with $U(1)_{B-L}$ and $U(1)_{L_e-L_ u}$ gauge symmetries, predicting neutrino oscillation parameters and addressing $(g-2)$ and leptogenesis.

Findings

Model predicts neutrino oscillation parameters consistent with experimental data.

Gauge bosons $Z_{B-L}$ and $Z_{e u}$ have masses in TeV and MeV ranges, respectively.

Model can be tested in upcoming long baseline experiments with high confidence.

Abstract

The proposed work is an extension of the Standard Model, where we have introduced two gauge symmetries, i.e., $U(1)_{B-L}$ and $U(1)_{L_e-L_\mu}$ to study neutrino phenomenology, muon, and electron $(g-2)$ as well as leptogenesis using the inverse seesaw mechanism. For this purpose, we have included three right-handed neutrinos $N_{R_i}$, three neutral fermions $S_{L_i} (i =1,2,3)$ and two scalar singlet bosons ($\chi_1$ and $\chi_2$). We get a definite structure for the neutrino mass matrix due to the aforementioned gauge symmetries. Thus, our model is able to predict the neutrino oscillation results, which are in accordance with the experimental data and is inclined towards normal ordering. The outcomes comprise the active neutrino masses, mixing angles, mass squared differences, CP-violating phase, etc. Moreover, since the extended gauge symmetries are local, there are corresponding gauge bosons, denoted as $Z_{B-L}$ and $Z_{e \mu}$. Of these, mass of $Z_{B-L}$ is $\mathcal{O}$(TeV) range to satisfy the collider constraint, while the mass of $Z_{e \mu}$ is in the MeV range, making it feasible to account for current electron and muon $(g-2)$ results via neutral current interactions. Furthermore, our model is able to account for leptogenesis, which can demonstrate the matter-antimatter asymmetry of the universe. Additionally, we have carried out the prospect of probing our model in the context of upcoming long baseline experiments: DUNE, T2HK, and T2HKK, at a confidence level of $5\sigma$. From the result it is clear that, our model can be tested in its $3\sigma$ C.L. with $5\sigma$ allowed region of DUNE, T2HK and T2HKK.