Charged-lepton mixing and lepton flavor violation

Diego Guadagnoli,Kenneth Lane

doi:10.1016/j.physletb.2015.10.010

Abstract

We present a model for calculating charged-lepton mixing matrices. These matrices are an essential ingredient for predicting lepton flavor-violating rates in the lepton number nonuniversal models recently proposed to explain anomalies in B-meson decays. The model is based on work on “constrained flavor breaking” by Appelquist, Bai and Piai relating the charged-lepton mass matrix, Mℓ, to those for the up- and down-type quarks, Mu,d. We use our recent model of lepton nonuniversality to illustrate the magnitudes of flavor-violating B-decay rates that might be expected. Decays with μτ final states generally have the highest rates by far.

Highlights

The LHCb Collaboration has reported several features of B-meson decays involving b → s + − transitions that consistently point to a departure from the Standard Model (SM) of particle physics:
lepton nonuniversality (LNU) interactions at high energy are accompanied by LFV interactions unless the leptons involved are chosen to be mass eigenstates [15]
The purpose of this paper is to present a model for estimating these and other LFV rates implied by new LNU interactions

Summary

Introduction

The LHCb Collaboration has reported several features of B-meson decays involving b → s + − transitions that consistently point to a departure from the Standard Model (SM) of particle physics:. LNU interactions at high energy are accompanied by LFV interactions unless the leptons involved are chosen to be mass eigenstates [15]. The purpose of this paper is to present a model for estimating these and other LFV rates implied by new LNU interactions.

Objectives

Results

Conclusion