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Improved estimates of the B-(s) -> VV decays in perturbative QCD approach
Zou, ZT; Ali, A; Lv CD(吕才典); Lu, CD; Liu, X; Li, Y
2015
发表期刊PHYSICAL REVIEW D
卷号91期号:5页码:54033
文章类型Article
摘要We reexamine the branching fractions, CP asymmetries, and other observables in a large number of B-q -> VV(q = u, d, s) decays in the perturbative QCD approach, where V denotes a light vector meson (rho, K*,omega, phi)The essential difference between this work and earlier similar works is of parametric origin and in the estimates of the power corrections related to the ratio r(i)(2) = m(Vi)(2)/ m(B)(2) (i = 2, 3) (m(V) and m(B) denote the masses of the vector and B meson, respectively). In particular, we use up-to-date distribution amplitudes for the final state mesons and keep the terms proportional to the ratio r(i)(2) in our calculations. Our updated calculations are in agreement with the experimental data, except for a limited number of decays which we discuss. We emphasize that the penguin annihilation and the hard- scattering emission contributions are essential to understanding the polarization anomaly, such as in the B -> phi K* and B-s -> phi phi decay modes. We also compare our results with those obtained in the QCD factorization approach and comment on the similarities and differences, which can be used to discriminate between these approaches in future experiments.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.054033
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000351876200005
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228368
专题理论物理室
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Zou, ZT,Ali, A,Lv CD,et al. Improved estimates of the B-(s) -> VV decays in perturbative QCD approach[J]. PHYSICAL REVIEW D,2015,91(5):54033.
APA Zou, ZT,Ali, A,吕才典,Lu, CD,Liu, X,&Li, Y.(2015).Improved estimates of the B-(s) -> VV decays in perturbative QCD approach.PHYSICAL REVIEW D,91(5),54033.
MLA Zou, ZT,et al."Improved estimates of the B-(s) -> VV decays in perturbative QCD approach".PHYSICAL REVIEW D 91.5(2015):54033.
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