Lifetime of the $B^+_c$ meson in relation to flavour anomalies

TL;DR

This paper introduces a novel method combining experimental data and operator product expansion to refine the decay rate predictions of the $B_c^+$ meson, aiming to better understand flavor anomalies.

Contribution

It presents a new approach that reduces theoretical uncertainties by considering differences in decay rates of $B$, $D$, and $B_c$ mesons, leveraging experimental data.

Findings

Reduced theoretical uncertainties in $B_c$ decay rate predictions.

Insights into flavor anomalies through decay rate differences.

Potential implications for testing the Standard Model.

Abstract

The Standard Model decay rate of the $B_c$ meson is discussed together with a novel approach that uses experimental data in combination with an operator product expansion. In the new method differences of $B,\,D$ and $B_c$ meson decay rates are considered for which the free-quark contributions drop out, leading to a reduction of the theory prediction.