Power suppressed effects in B-> X_s gamma at O(alpha_s)

TL;DR

This paper calculates O(alpha_s) corrections to Wilson coefficients in inclusive B->X_s gamma decays, analyzing their impact on extracting heavy quark parameters from photon spectrum moments.

Contribution

It provides the first computation of O(alpha_s) corrections to dimension five operators affecting B decay analyses, refining theoretical predictions.

Findings

O(alpha_s) corrections significantly influence Wilson coefficients.

Corrections impact the extraction of m_b and mu_pi^2 from experimental data.

Results improve the precision of heavy quark parameter determinations.

Abstract

We compute the O(alpha_s) corrections to the Wilson coefficients of the dimension five operators emerging from the Operator Product Expansion of inclusive radiative B decays. We discuss the impact of the resulting O(alpha_s Lambda_QCD^2/m_b^2) corrections on the extraction of m_b and mu_pi^2 from the moments of the photon spectrum.