# Probing signatures of beyond standard model physics through $B_s^* \rightarrow \mu^+ \mu^-$ decay

## TL;DR

This paper investigates potential new physics effects on the rare decay $B_s^*
ightarrow \mu^+ \mu^-$, finding that current models fitting other anomalies do not increase its predicted rate beyond the Standard Model expectation.

## Contribution

It provides a model-independent analysis showing that existing new physics explanations for $b
ightarrow s \mu^+ \mu^-$ anomalies do not enhance the $B_s^*
ightarrow \mu^+ \mu^-$ decay rate.

## Key findings

- No new physics operators improve the decay rate beyond the SM prediction.
- Current explanations for $b
ightarrow s \\mu^+ \\mu^-$ anomalies are consistent with the SM prediction for this decay.
- The decay remains a clean probe for future new physics searches.

## Abstract

We perform a model independent analysis to identify new physics operators which can enhance the branching ratio of $B_s^* \rightarrow \mu^+ \mu^-$ above its Standard Model (SM) prediction. We find that none of the new physics operators which provide a good fit to $b \rightarrow s \mu^+ \mu^-$ data can enhance the Br($B_s^* \rightarrow \mu^+ \mu^-$) above its SM value.