| 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
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| 2005
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| 发表期刊 | PHYSICAL REVIEW D
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| 卷号 | 71期号:7 |
| 通讯作者 | Abe, K (reprint author), KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan.
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| 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. |
| 关键词 | DECAYS
BELLE
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| 学科领域 | Astronomy & Astrophysics; Physics
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| DOI | 10.1103/PhysRevD.71.072003
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| 收录类别 | SCI
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| 语种 | 英语
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| WOS类目 | Astronomy & Astrophysics
; Physics, Particles & Fields
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| WOS记录号 | WOS:000228765400009
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/212537
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| 专题 | 实验物理中心
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
GB/T 7714 |
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).
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| 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).
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| 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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