Inclusive semileptonic B decays from QCD with NLO accuracy for power suppressed terms

TL;DR

This paper calculates next-to-leading order QCD corrections for inclusive semileptonic B meson decays, focusing on power-suppressed terms within the Heavy Quark Expansion, with implications for bottom and charm meson decay analyses.

Contribution

It provides an analytical computation of QCD corrections to power suppressed terms in semileptonic B decays, specifically for the chromo-magnetic operator, at NLO accuracy.

Findings

QCD correction to the chromo-magnetic operator coefficient computed analytically.

Results applicable to bottom and charm meson decay phenomenology.

Enhanced precision in theoretical predictions of inclusive semileptonic decay widths.

Abstract

We present the results of a calculation of the perturbative QCD corrections for the semileptonic inclusive width of a heavy flavored meson. Within the Heavy Quark Expansion we analytically compute the QCD correction to the coefficient of power suppressed contribution of the chromo-magnetic operator in the limit of vanishing mass of the final state quark. The important phenomenological applications are decays of bottom mesons, and to the less extend, charmed mesons.