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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
2006
发表期刊PHYSICAL REVIEW D
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
文章类型Article
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.
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.73.014024
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000235009900047
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被引频次:25[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/311005/240440
专题理论物理室
作者单位中国科学院高能物理研究所
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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.
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