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Titolo:
Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach - art. no. 074009
Autore:
Lu, CD; Ukai, K; Yang, MZ;
Indirizzi:
Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan Nagoya Univ Nagoya Aichi Japan 4648602 Phys, Nagoya, Aichi 4648602, Japan Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan Hiroshima UnivHigashihiroshima Japan 7398526 hihiroshima 7398526, Japan
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 7, volume: 6307, anno: 2001,
pagine: 4009 -
SICI:
0556-2821(20010401)6307:7<4009:BRACVO>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY MESON DECAYS; PION FORM-FACTOR; EXCLUSIVE PROCESSES; FACTORIZATION APPROACH; TRANSVERSE-MOMENTUM; WAVE-FUNCTIONS; ELECTROPRODUCTION; ASYMMETRIES; EXTRACTION; QUARK;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Lu, CD Inst High Energy Phys, POB 9184, Beijing 100039, Peoples R China Inst High Energy Phys POB 9184 Beijing Peoples R China 100039 hina
Citazione:
C.D. Lu et al., "Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach - art. no. 074009", PHYS REV D, 6307(7), 2001, pp. 4009

Abstract

We calculate the branching ratios and CP asymmetries for B-o -->pi (+)pi (-), B+-->pi (+)pi (o), and B-o --> pi (o)pi (o) decays. in a perturbative QCD approach. In this approach, we calculate nonfactorizable and annihilation type contributions, in addition to the usual factorizable contributions. We find that the annihilation diagram contributions are not very small as previously argued. Our result is in agreement with the measured branching ratio of B --> pi (+)pi (-) by the CLEO Collaboration. With a non-negligible contribution from annihilation diagrams and a large strong phase, we predict a large direct CP asymmetry in B-o --> pi (+)pi (-), and pi (o)pi (o), which can be tested by the current running B factories.

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Documento generato il 26/01/20 alle ore 16:01:07