Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system
Belle Collaboration
刊名PHYSICAL REVIEW LETTERS
2006
卷号97期号:24
关键词BELLE
学科分类Physics
DOI10.1103/PhysRevLett.97.242001
通讯作者Gabyshev, N (reprint author), Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
英文摘要Using a sample of 152x10(6) B (B) over bar pairs accumulated with the Belle detector at the KEKB e(+)e(-) collider, we study the decay mechanism of three-body charmed decay B-->Lambda(+)(c)(p) over bar pi(-). The intermediate two-body decay B-->Sigma(c)(2455)(0)(p) over bar is observed for the first time with a branching fraction of (3.7 +/- 0.7 +/- 0.4 +/- 1.0)x10(-5) and a statistical significance of 8.4 sigma. We also observe a low-mass enhancement in the (Lambda(+)(c)(p) over bar) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35(-0.02)(+0.01)+/- 0.02) GeV/c(2) and a width of (0.07(-0.03)(+0.04)+/- 0.04) GeV/c(2). We measure its branching fraction to be (3.9(-0.7)(+0.8)+/- 0.4 +/- 1.0)x10(-5) with a statistical significance of 6.2 sigma. The errors are statistical, systematic, and that of the Lambda(+)(c)-> pK(-)pi(+) decay branching fraction.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
语种英语
WOS记录号WOS:000242888700014
引用统计
被引频次:19[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/311005/212765
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. Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system[J]. PHYSICAL REVIEW LETTERS,2006,97(24).
APA Belle Collaboration.(2006).Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system.PHYSICAL REVIEW LETTERS,97(24).
MLA Belle Collaboration."Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system".PHYSICAL REVIEW LETTERS 97.24(2006).
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