Recent Developments in Bbar -> X_s gamma

TL;DR

This paper reviews recent theoretical advances in calculating the inclusive radiative decay of B mesons to X_s gamma within the Standard Model, focusing on higher-order corrections and implications for new physics.

Contribution

It provides a concise overview of the latest calculations of next-to-next-to-leading order contributions, power corrections, and cut-effects in B -> X_s gamma decay.

Findings

Updated theoretical precision in decay rate calculations

Insights into non-local power corrections

Summary of new physics implications

Abstract

We present a concise review of the recent theoretical progress concerning the standard model calculation of the inclusive radiative Bbar -> X_s gamma decay. Particular attention is thereby devoted to the calculations of the next-to-next-to-leading order fixed-order O(alpha_s^2) contributions, non-local O(alpha_s Lambda/m_b) power corrections, and logarithmic-enhanced O(alpha_s^2) cut-effects to the decay rate. The current status of new physics calculations of the inclusive b -> s gamma mode is also briefly summarized.