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Titolo:
Perturbative QCD analysis of B ->phi K decays and power counting - art. no. 112002
Autore:
Chen, CH; Keum, YY; Li, HN;
Indirizzi:
Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan Natl Cheng Kung Univ Tainan Taiwan 701 iv, Dept Phys, Tainan 701, Taiwan Acad Sinica, Inst Phys, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115Acad Sinica, Inst Phys, Taipei 115, Taiwan Natl Ctr Theoret Sci, Div Phys, Hsinchu 300, Taiwan Natl Ctr Theoret Sci Hsinchu Taiwan 300 i, Div Phys, Hsinchu 300, Taiwan
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 11, volume: 6411, anno: 2001,
pagine: 2002 -
SICI:
0556-2821(200112)6411:11<2002:PQAOB->2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY MESON DECAYS; HADRONIC CROSS-SECTIONS; STANDARD MODEL; FORM-FACTORS; B-DECAYS; THRESHOLD RESUMMATIONS; SUDAKOV SUPPRESSION; PARTICLE PHYSICS; CP VIOLATION; FACTORIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, CH Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan Natl Cheng Kung Univ Tainan Taiwan 701 Phys, Tainan 701, Taiwan
Citazione:
C.H. Chen et al., "Perturbative QCD analysis of B ->phi K decays and power counting - art. no. 112002", PHYS REV D, 6411(11), 2001, pp. 2002

Abstract

We investigate the exclusive nonleptonic B meson decays B-phiK in the perturbative QCD formalism. It is shown that the end-point (logarithmic and linear) singularities in the decay amplitude, do not exist, after k(T) and threshold resummations are included. Power counting for emission and annihilation topologies of diagrams, including both factorizable and nonfactorizableones, is discussed with Sudakov effects taken into account. Our predictions for the branching ratios B(B-phiK)similar to 10x10(-6) are larger than those (less than or equal to 4x10(-6)) from the factorization approach because of dynamical enhancement of penguin contributions. Whether this enhancement is essential for penguin-dominated modes can be justified by experimental data.

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Documento generato il 05/04/20 alle ore 22:43:34