Improved estimates of the B-(s) -> VV decays in perturbative QCD approach

	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
刊名	PHYSICAL REVIEW D
	2015
卷号	91 期号:5 页码:54033
英文摘要	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.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000351876200005
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228368]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	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.