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NNLO vertex corrections in charmless hadronic B decays: Real part

Abstract:

We compute the real part of the 2-loop vertex corrections for charmless hadronic B decays, completing the NNLO calculation of the topological tree amplitudes in QCD factorization. Among the technical aspects we show that the hard-scattering kernels are free of soft and collinear infrared divergences at the 2-loop level, which follows after an intricate subtraction procedure involving evanescent four quark operators. The numerical impact of the considered corrections is found to be moderate, w...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Journal:
NUCLEAR PHYSICS B
Volume:
822
Issue:
1-2
Pages:
172-200
Publication date:
2009-11-21
DOI:
ISSN:
0550-3213
URN:
uuid:39a43679-b437-4252-b223-b5cd1631d560
Source identifiers:
365368
Local pid:
pubs:365368
Language:
English

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