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Higher order corrections to QCD factorization in B --> pi K, pi pi decays

Neubert, Matthias; Pecjak, Ben D.

Authors

Matthias Neubert



Abstract

The renormalon calculus is used to calculate the terms of order β0n−1αsn in the perturbative expansions of the Wilson coefficients and hard-scattering kernels entering the QCD factorization formula for hadronic B-meson decays into two light pseudoscalar mesons. The asymptotic behavior of the expansions is analyzed, and a minimal model of power corrections arising from soft ``non-factorizable'' gluon exchange to the B→πK,ππ decay amplitudes is obtained, which takes into account the structure of the leading and subleading infrared renormalon singularities. Whereas the resulting power corrections are generally very small, some of the strong-interaction phases of the hard-scattering kernels receive sizeable two-loop corrections. The implications of these findings on CP asymmetries and branching ratios are investigated.

Citation

Neubert, M., & Pecjak, B. D. (2002). Higher order corrections to QCD factorization in B --> pi K, pi pi decays. Journal of High Energy Physics, 2002(02), Article 028. https://doi.org/10.1088/1126-6708/2002/02/028

Journal Article Type Article
Publication Date 2002
Deposit Date Dec 9, 2015
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Electronic ISSN 1029-8479
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2002
Issue 02
Article Number 028
DOI https://doi.org/10.1088/1126-6708/2002/02/028
Public URL https://durham-repository.worktribe.com/output/1394132