A model with flavor-dependent gauged $U(1)_{B-L_1}\times U(1)_{B-L_2-L_3}$ symmetry

TL;DR

This paper introduces a novel flavor-dependent gauged symmetry model extending the Standard Model, incorporating new gauge bosons and Higgs fields, and analyzes its phenomenological implications, especially in meson mixing and lepton flavor violation.

Contribution

It proposes a new flavor-dependent gauged $U(1)$ symmetry model with anomaly cancellation and explores its phenomenology and experimental constraints.

Findings

Current bounds on extra gauge bosons from meson mixing and collider data.

The model predicts contributions to lepton flavor violating decays.

Constraints on model parameters from existing experimental data.

Abstract

We propose a new model with flavor-dependent gauged $U(1)_{B-L_1}\times U(1)_{B-L_{2}-L_{3}}$ symmetry in addition to the flavor-blind one in the standard model. The model contains three right-handed neutrinos to cancel gauge anomalies and several Higgses to construct the measured fermion masses. We show the generic feature of the model and explore its phenomenology. In particular, we discuss the current bounds on the extra gauge bosons from the K and B meson mixings as well as the LEP and LHC data and focus on their contributions to the lepton flavor violating processes of $\ell_{i+1}\to \ell_i\gamma$ (i=1,2).