Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region

M. Beneke (RWTH Aachen University; T. Huber (RWTH Aachen University); University of Zurich); Xin-Qiang Li (RWTH Aachen University)

arxiv: 0810.1230 · v2 · pith:GNONIQ6Pnew · submitted 2008-10-07 · ✦ hep-ph

Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region

M. Beneke (RWTH Aachen University , University of Zurich) , T. Huber (RWTH Aachen University) , Xin-Qiang Li (RWTH Aachen University) This is my paper

classification ✦ hep-ph

keywords correctiondecaysregionsemi-leptonicshape-functiontwo-loopalphab-quark

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We calculate the two-loop QCD correction to the form factors of on-shell b-quark decay to an energetic massless quark, which constitutes the last missing piece required for an O(alpha_s^2) determination of |V_ub| from inclusive semi-leptonic \bar B --> X_u l nu decays in the shape-function region.

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Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region

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