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Titolo:
Charmless hadronic decays B -> PP,PV,VV and new physics effects in the general two-Higgs-doublet models - art. no. 074005
Autore:
Xiao, ZJ; Li, CS; Chao, KT;
Indirizzi:
Peking Univ, Dept Phys, Beijing 100871, Peoples R China Peking Univ Beijing Peoples R China 100871 ijing 100871, Peoples R China Henan Normal Univ, Dept Phys, Xinxiang 453002, Henan, Peoples R China Henan Normal Univ Xinxiang Henan Peoples R China 453002 , Peoples R China CCAST, World Lab, Beijing 100080, Peoples R China CCAST Beijing Peoples R China 100080 ab, Beijing 100080, Peoples R China
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 7, volume: 6307, anno: 2001,
pagine: 4005 -
SICI:
0556-2821(20010401)6307:7<4005:CHDB-P>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
B-MESON DECAYS; CHANGING NEUTRAL CURRENTS; CP-VIOLATING ASYMMETRIES; IMPROVED FACTORIZATION APPROACH; INCLUSIVE ETA' PRODUCTION; TOP-QUARK PAIRS; LEADING LOGARITHMS; PENGUIN DIAGRAMS; STRONG PHASES; 2-HIGGS-DOUBLET MODELS;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
107
Recensione:
Indirizzi per estratti:
Indirizzo: Xiao, ZJ Peking Univ, Dept Phys, Beijing 100871, Peoples R China Peking Univ Beijing Peoples R China 100871 871, Peoples R China
Citazione:
Z.J. Xiao et al., "Charmless hadronic decays B -> PP,PV,VV and new physics effects in the general two-Higgs-doublet models - art. no. 074005", PHYS REV D, 6307(7), 2001, pp. 4005

Abstract

Based on the low-energy effective Hamiltonian with generalized factorization, we calculate the new physics contributions to the branching ratios of the two-body charmless hadronic decays of B-u and B-d mesons induced by the new gluonic and electroweak charged-Higgs penguin diagrams in the general two-Higgs doublet models (models I, II, and III). Within the considered parameter space, we find the following. (a) The new physics effects from new gluonic penguin diagrams strongly dominate over those from the new gamma- andZ(o)- penguin diagrams. (b) In models I and II, new physics contributions to most studied B meson decay channels are rather small in size, from -15% to 20%. (c) In model III, however, the new physics enhancements to the penguin-dominated decay modes can he significant, similar to (30-200)%, and therefore are measurable in forthcoming high precision B experiments. (d) The new physics enhancements to ratios B(B-->K eta') are significant in model III, similar to (35-70)%, and hence provide a simple and plausible new physics interpretation for the observed unexpectedly large B-->K eta' decay rates. (e) The theoretical predictions for B(B-->K(+)pi) and B(B-->K(o)pi (+)) in model III are still consistent with the data within 2 sigma errors. (f) The significant new physics enhancements to the blanching ratios of B-->K-opi (o), K* eta, K*(+) pi (-), K+ phi, K(*o)omega, K*+ phi, and K(*o)phi decays are helpful to improve the agreement between the data and the theoretical predictions. (g) The theoretical predictions of B(B -->PP,PV,VV) in the2HDM's are generally consistent with experimental measurements and upper limits (90% C,L.).

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Documento generato il 26/01/20 alle ore 17:04:46