Improved measurement of CP-violation parameters sin2 phi(1) and |lambda|, B meson lifetimes, and B-0-(B)over-bar(0) mixing parameter Delta m(d)
Belle Collaboration
刊名PHYSICAL REVIEW D
2005
卷号71期号:7
关键词DECAYS BELLE
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.71.072003
通讯作者Abe, K (reprint author), KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan.
英文摘要We present a precise measurement of the standard model CP-violation parameter sin2 phi(1), the direct CP violation parameter vertical bar lambda vertical bar, the lifetimes of charged and neutral B mesons and their ratio, and the B-0-(B) over bar (0) mixing parameter Delta m(d) based on a sample of 152x10(6) B(B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One of two B mesons is fully reconstructed in a CP-eigenstate or a flavor-eigenstate decay channel. The flavor of the accompanying B meson is identified from its decay products. From the distributions of the time interval between the two B meson decay points, we obtain sin2 phi(1)=0.728 +/- 0.056(stat)+/- 0.023(syst), vertical bar lambda vertical bar=1.007 +/- 0.041(stat)+/- 0.033(syst), tau(B)(0)=[1.534 +/- 0.008(stat)+/- 0.010(syst)] ps, tau(B)(+)=[1.635 +/- 0.011(stat)+/- 0.011(syst)] ps, tau(B)(+)/tau(B)(0)=1.066 +/- 0.008(stat)+/- 0.008(syst) and Delta m(d)=[0.511 +/- 0.005(stat)+/- 0.006(syst)] ps(-1). The results for sin2 phi(1) and vertical bar lambda vertical bar are consistent with the standard model expectations. The significance of the observed deviation from unity in the lifetime ratio exceeds 5 standard deviations.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000228765400009
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被引频次:78[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/311005/212537
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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Belle Collaboration. Improved measurement of CP-violation parameters sin2 phi(1) and |lambda|, B meson lifetimes, and B-0-(B)over-bar(0) mixing parameter Delta m(d)[J]. PHYSICAL REVIEW D,2005,71(7).
APA Belle Collaboration.(2005).Improved measurement of CP-violation parameters sin2 phi(1) and |lambda|, B meson lifetimes, and B-0-(B)over-bar(0) mixing parameter Delta m(d).PHYSICAL REVIEW D,71(7).
MLA Belle Collaboration."Improved measurement of CP-violation parameters sin2 phi(1) and |lambda|, B meson lifetimes, and B-0-(B)over-bar(0) mixing parameter Delta m(d)".PHYSICAL REVIEW D 71.7(2005).
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