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Observation of B-0 -> p(Lambda)over-barD(*)(-)
Belle Collaboration
2015
发表期刊PHYSICAL REVIEW LETTERS
卷号115页码:221803
摘要We report the first observation of the decays B-0 -> p (Lambda) over barD(*)(-). The data sample of 711 fb(-1) used in this analysis corresponds to 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe 19.8 sigma and 10.8 sigma excesses of events for the two decay modes and measure the branching fractions of B-0 -> p (Lambda) over barD(-) and B-0 -> p (Lambda) over barD*(-) to be (25.1 +/- 2.6 +/- 3.5) x 10(-6) and (33.6 +/- 6.3 +/- 4.4) x 10(-6), respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (p (Lambda) over bar) system is observed, consistent with that observed in similar B decays.
文章类型Article
学科领域Physics
DOI10.1103/PhysRevLett.115.221803
收录类别SCI ; EI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000365524500005
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被引频次:4[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/311005/229088
专题实验物理中心
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Belle Collaboration. Observation of B-0 -> p(Lambda)over-barD(*)(-)[J]. PHYSICAL REVIEW LETTERS,2015,115:221803.
APA Belle Collaboration.(2015).Observation of B-0 -> p(Lambda)over-barD(*)(-).PHYSICAL REVIEW LETTERS,115,221803.
MLA Belle Collaboration."Observation of B-0 -> p(Lambda)over-barD(*)(-)".PHYSICAL REVIEW LETTERS 115(2015):221803.
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