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Spectator scattering at NLO in non-leptonic B decays: Tree amplitudes
journal contribution
posted on 2023-06-07, 23:50 authored by M Beneke, Sebastian JaegerSebastian JaegerWe compute the I-loop (alpha(2)(s)) correction to hard spectator scattering in non-leptonic B decay tree amplitudes. This forms part of the NNLO contribution to the QCD factorization formula for hadronic B decays, and introduces a new rescattering phase that corrects the leading-order result for direct CP asymmetries. Among the technical issues, we discuss the cancellation of infrared divergences, and the treatment of evanescent four-quark operators. The infrared finiteness of our result establishes factorization of spectator scattering at the I-loop order. Depending on the values of hadronic input parameters, the new I-loop correction may have a significant impact on tree-dominated decays such as B -> pi pi.
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Publication status
- Published
Journal
Nuclear Physics BISSN
0550-3213Publisher
ElsevierExternal DOI
Issue
1-2Volume
751Page range
160-185Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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