Fermionic corrections to the interference of the electro- and chromomagnetic dipole operators in anti-B --> X(s) gamma at O(alpha(s)**2)

TL;DR

This paper computes high-order fermionic corrections to the interference effects in the inclusive B meson decay to Xs gamma, providing analytical results for decay rate and photon spectrum at two-loop order.

Contribution

It introduces the first analytical calculation of fermionic corrections at O(α_s^2) for the interference of dipole operators in B decay.

Findings

Analytical expressions for total decay rate and photon spectrum at O(α_s^2)

Enhanced precision in theoretical predictions for B → Xsγ decay

Improved understanding of QCD corrections in flavor physics

Abstract

We calculate the virtual and bremsstrahlung fermionic corrections due to the interference of the electro- and chromomagnetic dipole operators in the inclusive \bar{B}\to X_s\gamma decay at O(\alpha_s^2) and present analytical results for both the total decay rate and the photon energy spectrum.