Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha
BaBar Collaboration
刊名PHYSICAL REVIEW LETTERS
2007
卷号98期号:11
学科分类Physics
DOI10.1103/PhysRevLett.98.111801
通讯作者Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
英文摘要We search for the decays B-0 ->rho(0)rho(0), B-0 ->rho(0)f(0)(980), and B-0 -> f(0)(980)f(0)(980) in a sample of about 384x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at Stanford Linear Accelerator Center. We find evidence for B-0 ->rho(0)rho(0) with 3.5 sigma significance and measure the branching fraction B=(1.07 +/- 0.33 +/- 0.19)x10(-6) and longitudinal polarization fraction f(L)=0.87 +/- 0.13 +/- 0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle alpha due to penguin contributions in B ->rho rho decays is 18 degrees at the 1 sigma level. We also set upper limits on the B-0 ->rho(0)f(0)(980) and B-0 -> f(0)(980)f(0)(980) decay rates.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
语种英语
WOS记录号WOS:000244959300017
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被引频次:12[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/311005/212796
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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BaBar Collaboration. Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha[J]. PHYSICAL REVIEW LETTERS,2007,98(11).
APA BaBar Collaboration.(2007).Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha.PHYSICAL REVIEW LETTERS,98(11).
MLA BaBar Collaboration."Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha".PHYSICAL REVIEW LETTERS 98.11(2007).
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