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Observation of B-s(0) -> D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)
Belle Collaboration
2010
发表期刊PHYSICAL REVIEW LETTERS
卷号105期号:20
通讯作者Esen, S (reprint author), Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
摘要We have made the first observation of B-s(0) -> D-s(()*()+) D-s(()*()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B-s(0) -> Ds+Ds-) = (1.03(-0.32-0.25)(+0.39+0.26))% B(B-s(0) -> Ds*D-+/-(s)-/+) = (2.75(-0.71)(+0.83) +/- 0.69)%, and B(B-s(0) -> D-s*(+) D-s*(-)) = (3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B-s(0) -> D-s(()*()+) D-s(()*()-)] = (6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B-s(0) -> D-s(()*()+) D-s(()*()-) saturates decays to CP-even final states, the branching fraction determines the ratio Delta Gamma(s)/cos phi, where Delta Gamma(s) is the difference in widths between the two B-s-(B) over bar (s) mass eigenstates, and phi is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain Delta Gamma(s)/Delta Gamma(s) = 0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Gamma(s) is the mean decay width.
关键词PHYSICS SYSTEM DECAYS
学科领域Physics
DOI10.1103/PhysRevLett.105.201802
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000284052700004
引用统计
被引频次:11[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/311005/212990
专题实验物理中心
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
Belle Collaboration. Observation of B-s(0) -> D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)[J]. PHYSICAL REVIEW LETTERS,2010,105(20).
APA Belle Collaboration.(2010).Observation of B-s(0) -> D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s).PHYSICAL REVIEW LETTERS,105(20).
MLA Belle Collaboration."Observation of B-s(0) -> D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)".PHYSICAL REVIEW LETTERS 105.20(2010).
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