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Titolo:
Revisiting charmless two-body B decays involving eta ' and eta
Autore:
Yang, MZ; Yang, YD;
Indirizzi:
Chinese Acad Sci, Inst High Energy Phys, Div Theory, Beijing 100039, Peoples R China Chinese Acad Sci Beijing Peoples R China 100039 100039, Peoples R China Hiroshima Univ, Dept Phys, Hiroshima 7398526, Japan Hiroshima Univ Hiroshima Japan 7398526 pt Phys, Hiroshima 7398526, Japan Ochanomizu Univ, Dept Phys, Bunkyo Ku, Tokyo 1128610, Japan Ochanomizu Univ Tokyo Japan 1128610 hys, Bunkyo Ku, Tokyo 1128610, Japan
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 3, volume: 609, anno: 2001,
pagine: 469 - 498
SICI:
0550-3213(20010827)609:3<469:RCTBDI>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMPROVED FACTORIZATION APPROACH; MESON DECAYS; QUANTUM CHROMODYNAMICS; PSEUDOSCALAR MESONS; EXCLUSIVE PROCESSES; WAVE-FUNCTIONS; CP VIOLATION; QCD; ASYMMETRIES; MECHANISM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Yang, MZ Chinese Acad Sci, Inst High Energy Phys, Div Theory, POB 918-4, Beijing 100039, Peoples R China Chinese Acad Sci POB 918-4 Beijing Peoples R China 100039 China
Citazione:
M.Z. Yang e Y.D. Yang, "Revisiting charmless two-body B decays involving eta ' and eta", NUCL PHYS B, 609(3), 2001, pp. 469-498

Abstract

We have studied charmless two-body B decays involving eta and eta ' in theframework of QCD improved factorization approach. The spectator hard scattering mechanism for eta ' production have been re-examined and extended, which contributions are incorporated consistently into the factorizable leading contributions. It is found that the conventional mechanism would give Br(B --> eta 'K) similar to 30 x 10(-6) which agrees with predictions based on naive factorization approaches. With the incorporation of spectator hard scattering mechanism contributions, theoretical predictions are improved much and the bulk of Br(B --> eta 'K) are accommodated in the reasonable parameter space. We have also presented calculations of g*g* - eta(') transition form factors within the standard hard scattering approach. It is shown that the new contributions in the modes such as B --> eta ' + vector and B --> eta + pi, rho, K ((*)) are small. Direct CP-violation in those decay modes are predicted. It is shown that the prospects for measuring direct CP-violation effects in B+/- --> eta 'K+/- , eta ' pi +/-, eta pi (+/-), and etaK(+/-) are promising at B factories in the near future. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 26/01/20 alle ore 22:09:50