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Titolo:
Charmless decays B -> PP, PV, and the effects of new strong and electroweak penguins in topcolor-assisted technicolor model
Autore:
Xiao, ZJ; Li, WJ; Guo, LB; Lu, GR;
Indirizzi:
CCAST, World Lab, Beijing 100080, Peoples R China CCAST Beijing Peoples R China 100080 ab, Beijing 100080, Peoples R China Henan Normal Univ, Dept Phys, Xinxiang 453002, Peoples R China Henan Normal Univ Xinxiang Peoples R China 453002 53002, Peoples R China Peking Univ, Dept Phys, Beijing 100871, Peoples R China Peking Univ Beijing Peoples R China 100871 ijing 100871, Peoples R China Wuhan Univ, Dept Phys, Wuhan 430000, Peoples R China Wuhan Univ Wuhan Peoples R China 430000 s, Wuhan 430000, Peoples R China
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 4, volume: 18, anno: 2001,
pagine: 681 - 709
SICI:
1434-6044(200101)18:4<681:CDB-PP>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-HIGGS DOUBLET MODEL; IMPROVED FACTORIZATION APPROACH; DYNAMICAL SYMMETRY BREAKING; CP-VIOLATING ASYMMETRIES; ART. NO. 094005; RARE K-DECAYS; MESON DECAYS; STANDARD MODEL; LEADING LOGARITHMS; 2-HIGGS-DOUBLET MODELS;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
113
Recensione:
Indirizzi per estratti:
Indirizzo: Xiao, ZJ CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China CCASTPOB 8730 Beijing Peoples R China 100080 0, Peoples R China
Citazione:
Z.J. Xiao et al., "Charmless decays B -> PP, PV, and the effects of new strong and electroweak penguins in topcolor-assisted technicolor model", EUR PHY J C, 18(4), 2001, pp. 681-709

Abstract

Based on the low energy effective Hamiltonian with generalized factorization, we calculate the new physics contributions to the branching ratios and CP-violating asymmetries of the two-body charmless hadronic decays B -> PP,PV from the new strong and electroweak penguin diagrams in the topcolor-assisted technicolor (TC2) model. The top-pion penguins dominate the new physics corrections, and both new gluonic and electroweak penguins contribute effectively to most decay modes. For tree-dominated decay modes B -> pi pi, rho pi, etc. the new physics corrections are less than 10%. For decays B -> K(*) pi, K-(*())eta,pi (0)eta (()'()),eta (()'())eta ((")),K (K) over bar (0), (K) over bar*K-0, etc. the new physics enhancements can be rather large(from -70% to similar to 200%) and are insensitive to the variations of N-c(eff), k(2), eta and m(pi) within reasonable ranges. For the decays B-0 ->phi pi phi eta ((')), K*(K) over bar (0) and rho K-+(0), deltaB is strongly N-c(eff) dependent: varying from -90% to similar to 1680% in the range ofN-c(eff) = 2-infinity. The new physics corrections to the CP-Violating asymmetries A(CP) vary greatly for different B decay channels. For five measured CP asymmetries of the B -> K pi, K eta',w pi decays, deltaA(CP) is only about 20% and will be masked by large theoretical uncertainties. The new physics enhancements to interesting B -> k eta' decays are significant in size (similar to 50%), insensitive to the variations of the input parameters and hence lead to a plausible interpretation for the unexpectedly large B ->K eta' decay rates. The TC2 model predictions for branching ratios and CP-violating asymmteries of all fifty-seven B -> PP, PV decay modes are consistent with the available data within one or two standard deviations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 01:06:07