Searches for rare $B_s^0$ and $B^0$ decays into four muons

TL;DR

This paper reports on the search for rare decays of $B_s^0$ and $B^0$ mesons into four muons using LHCb data, setting upper limits on their branching fractions due to no observed evidence.

Contribution

First search for these specific rare $B$ meson decays into four muons, establishing new upper limits on their branching fractions.

Findings

No evidence of the six decay modes was observed.

Upper limits on branching fractions range from $1.8\times10^{-10}$ to $2.6\times10^{-9}$.

Analysis used 9 fb$^{-1}$ of LHCb proton-proton collision data.

Abstract

Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$. Direct decays and decays via light scalar and $J/\psi$ resonances are considered. No evidence for the six decays searched for is found and upper limits at the 95% confidence level on their branching fractions ranging between $1.8\times10^{-10}$ and $2.6\times10^{-9}$ are set.