B{yields}K{pi} decays with 1/m{sub b} corrections in QCD factorization
- CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
- Institute of High Energy Physics, P.O.Box 918(4), Beijing 100039 (China)
- CCAST (The World Laboratory), P.O. Box 8730, Beijing 100080 (China)
- Department of Physics, Nankai University, Tianjin 300071 (China)
A careful investigation of 1/m{sub b} power-suppressed effects is crucial for enhancing predictive power of the QCD factorization approach to charmless B decays. It is instructive to systematically investigate the 1/m{sub b} effects from soft- and hard-gluon exchanges, in addition to annihilation topology in the charmless B decays. In this work we try to give a systematic discussion on impact of such soft and hard exchanges on the penguin-dominated B{yields}K{pi} decays within the framework of the light-cone QCD sum rules (LCSR). For the weak phase {gamma}(=ImV{sub ub}*) ranging from 40 deg. to 80 deg. , we find that because of the annihilation and soft and hard exchanges a numerical increase of 20-30% is expected in the branching ratios up to O(1/m{sub b}{sup 2}) corrections; the resultant soft and hard corrections are less important than the annihilation contributions and amount only to a level of 10%. Possible sources of uncertainties are discussed in some details.
- OSTI ID:
- 20705607
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.094013; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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