Precision Calculations in B physics

TL;DR

This paper reviews recent advanced theoretical calculations of B meson properties, including higher-order corrections to decay processes, crucial for precise CKM matrix element determination and understanding B meson mixing.

Contribution

It presents new higher-order quantum chromodynamics calculations for B meson decay rates and mixing, improving theoretical precision in flavor physics.

Findings

Next-to-next-to-leading order corrections to nonleptonic B decays

Next-to-next-to-next-to-leading order corrections to semileptonic B decays

Enhanced accuracy in CKM matrix element V_cb determination

Abstract

We discuss recent higher order calculations to properties of $B$ mesons. This includes next-to-next-to-leading order corrections to nonleptonic and next-to-next-to-next-to-leading order corrections to semileptonic $B$ meson decays. The latter is important in connection to the determination of the CKM matrix element $V_{cb}$. We also discuss next-to-next-to-leading order corrections to the width difference in the neutral $B$ meson system.