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

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arxiv 0810.1230 v2 pith:GNONIQ6P submitted 2008-10-07 hep-ph

M. Beneke (RWTH Aachen University , University of Zurich) , T. Huber (RWTH Aachen University) , Xin-Qiang Li (RWTH Aachen University) This is my paper · ORCID
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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Cited by 1 Pith paper

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  1. Towards NNLO QCD predictions for off-shell top-quark pair production and decays

    hep-ph 2025-07 conditional novelty 8.0 of 10

    The first NNLO QCD prediction for off-shell W+W-bbbar production with massive bottom quarks at the LHC, using a double-pole approximation for the two-loop virtual and an on-shell matching for non-factorisable corrections.

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