Family Non-universal $U(1)^\prime$ Gauge Symmetries and $b\to s$ Transitions

TL;DR

This paper analyzes how family non-universal $U(1)^ extprime$ gauge symmetries can explain anomalies in $b o s$ transitions, including $B_s$ mixing and CP asymmetries, using a model-independent approach.

Contribution

It provides a model-independent analysis showing that certain $U(1)^ extprime$ models can accommodate observed $b o s$ anomalies.

Findings

Can explain $B_s - ar B_s$ mixing anomalies

Accounts for CP asymmetries in $B_d$ decays

Supports family non-universal $U(1)^ extprime$ as viable

Abstract

We present a correlated analysis for the $\Delta B =1, 2$ processes which occur via $b\to s$ transitions within models with a family non-universal $U(1)^\prime$. We take a model-independent approach, and only require family universal charges for the first and second generations and small fermion mixing angles. The results of our analysis show that within this class of models, the anomalies in $B_s - \bar B_s$ mixing and the time-dependent CP asymmetries of the penguin-dominated $B_d \to (\pi, \phi, \eta', \rho, \omega, f_0)K_S$ decays can be accommodated.