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

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Ewerth, Thorsten
Gambino, Paolo
Nandi, Soumitra
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Abstract
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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.
Comment: 14 pages,4 figures, v2: comments and one figure on endpoint behaviour added, version to appear on NPB
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High Energy Physics - Phenomenology
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