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Measurement of the Absolute Branching Fraction for Lambda(+)(c) -> Lambda e(+)nu(e)
BESIII Collaboration
2015
发表期刊PHYSICAL REVIEW LETTERS
卷号115页码:221805
摘要We report the first measurement of the absolute branching fraction for Lambda(+)(c) -> Lambda e(+)nu(e). This measurement is based on 567 pb(-1) of e(+)e(-) annihilation data produced at root s = 4.599 GeV, which is just above the Lambda(+)(c)Lambda(-)(c) threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be B(Lambda(+)(c) -> Lambda e(+)nu(e)) = [3.63 +/- 0.38(stat) +/- 0.20(syst)] %, representing a significant improvement in precision over the current indirect determination. As the branching fraction for Lambda(+)(c) -> Lambda e(+)nu(e) is the benchmark for those of other Lambda(+)(c) semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.
文章类型Article
学科领域Physics
DOI10.1103/PhysRevLett.115.221805
收录类别SCI ; EI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000365525400007
引用统计
被引频次:18[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/311005/229084
专题实验物理中心
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BESIII Collaboration. Measurement of the Absolute Branching Fraction for Lambda(+)(c) -> Lambda e(+)nu(e)[J]. PHYSICAL REVIEW LETTERS,2015,115:221805.
APA BESIII Collaboration.(2015).Measurement of the Absolute Branching Fraction for Lambda(+)(c) -> Lambda e(+)nu(e).PHYSICAL REVIEW LETTERS,115,221805.
MLA BESIII Collaboration."Measurement of the Absolute Branching Fraction for Lambda(+)(c) -> Lambda e(+)nu(e)".PHYSICAL REVIEW LETTERS 115(2015):221805.
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