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arxiv: 1005.1173 · v1 · submitted 2010-05-07 · ✦ hep-ph

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Large-m_c Asymptotic Behaviour of O(alpha_s²) Corrections to B -> X_s gamma

Mikolaj Misiak , Matthias Steinhauser
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classification ✦ hep-ph
keywords alphacorrectionsgammaasymptoticbeenbehaviourbranchingcalculation
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We present details of our evaluation of the NNLO QCD corrections to BR(B -> X_s gamma) in the heavy charm limit m_c >> m_b/2. Results of this calculation have been essential for estimating O(alpha_s^2) effects in this branching ratio via interpolation in m_c.

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  1. The photon-energy spectrum in $B\to X_s\gamma$ to N$^3$LO: light-fermion and large-$N_{\rm c}$ corrections

    hep-ph 2026-03 unverdicted novelty 8.0

    N3LO calculation of the B to Xs gamma photon spectrum including complete light-fermion corrections, two massive fermion loops, and large-Nc terms, with improved results in kinetic and MSR mass schemes.