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Titolo: B -> J/psi K decays in QCD factorization - art. no. 074011
Autore: Cheng, HY; Yang, KC;
- Indirizzi:
- Acad Sinica, Inst Phys, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115Acad Sinica, Inst Phys, Taipei 115, Taiwan Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA 11973 ab, Dept Phys, Upton, NY 11973 USA Chung Yuan Christian Univ, Dept Phys, Chungli 320, Taiwan Chung Yuan Christian Univ Chungli Taiwan 320 t Phys, Chungli 320, Taiwan
- Titolo Testata:
- PHYSICAL REVIEW D
fascicolo: 7,
volume: 6307,
anno: 2001,
pagine: 4011 -
- SICI:
- 0556-2821(20010401)6307:7<4011:B-JKDI>2.0.ZU;2-Q
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- HADRONIC 2-BODY DECAYS; HEAVY MESON DECAYS;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- --discip_EC--
- Citazioni:
- 20
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Cheng, HY Acad Sinica, Inst Phys, Taipei 115, Taiwan Acad Sinica Taipei Taiwan 115 a, Inst Phys, Taipei 115, Taiwan
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- Citazione:
- H.Y. Cheng e K.C. Yang, "B -> J/psi K decays in QCD factorization - art. no. 074011", PHYS REV D, 6307(7), 2001, pp. 4011
Abstract
The hadronic decays B --> J/psiK (K*) are interesting because experimentally they are the only color-suppressed modes which have been measured, and theoretically they are calculable by QCD factorization even when the emittedmeson J/psi is heavy. We analyze the decay B --> J/psiK within the framework of QCD factorization. We show explicitly the scale and gamma (5)-scheme independence of decay amplitudes and infrared safety of nonfactorizable corrections at twist-2 order. Leading-twist contributions from the light-cone distribution amplitudes (LCDAs) of the mesons are too small to accommodate the data; the nonfactorizable corrections to naive factorization are small. We study the twist-3 effects due to the kaon and find that the coefficienta(2)(J/psiK) is largely enhanced by the nonfactorizable spectator interactions arising from the twist-3 kaon LCDA phi (K)(sigma), which an formally power suppressed but chirally, logarithmically, and kinematically enhanced. Therefore, factorization breaks down at twist-3 order. The higher-twist effects of J/psi are briefly discussed. Our result also resolves the long-standing sign ambiguity of a(2)(J/psiK), which turns out to be positive for itsreal part.
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Documento generato il 20/06/13 alle ore 00:57:32