Branching ratio and polarization of B ->rho(omega)rho(omega) decays in perturbative QCD approach

	Branching ratio and polarization of B ->rho(omega)rho(omega) decays in perturbative QCD approach
	Li Y(李营); Lv CD(吕才典); Li, Y; Lu, CD
刊名	PHYSICAL REVIEW D
	2006
卷号	73 期号:1 页码:14024
通讯作者	CCAST, World Lab, Beijing 100080, Peoples R China ; Inst High Energy Phys, Beijing 100049, Peoples R China
英文摘要	In this work, we calculate the branching ratios, polarization fractions and CP asymmetry parameters of decay modes B -> rho(omega)rho(omega) in the perturbative QCD approach, which is based on k(T) factorization. After calculation, we find that the branching ratios of B-0 -> rho(+) rho(-), B+ -> rho(+) rho(0), and B+ -> rho(+)omega are at the order of 10(-5), and their longitudinal polarization fractions are more than 90%. The above results agree with BaBar's measurements. We also calculate the branching ratios and polarization fractions of B-0 -> rho(0) rho(0), B-0 -> rho(0)omega, and B-0 -> omega omega decays. We find that their longitudinal polarization fractions are suppressed to 60-80% due to a small color suppressed tree contribution. The dominant penguin and nonfactorization tree contributions equally contribute to the longitudinal and transverse polarization, which will be tested in the future experiments. We predict the CP asymmetry of B-0 -> rho(+) rho(-) and B+ -> rho(+) rho(0), which will be measured in B factories.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000235009900047
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240440]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li Y,Lv CD,Li, Y,et al. Branching ratio and polarization of B ->rho(omega)rho(omega) decays in perturbative QCD approach[J]. PHYSICAL REVIEW D,2006,73(1):14024.
APA	李营,吕才典,Li, Y,&Lu, CD.(2006).Branching ratio and polarization of B ->rho(omega)rho(omega) decays in perturbative QCD approach.PHYSICAL REVIEW D,73(1),14024.
MLA	李营,et al."Branching ratio and polarization of B ->rho(omega)rho(omega) decays in perturbative QCD approach".PHYSICAL REVIEW D 73.1(2006):14024.