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Experimental constraints on the spin and parity of the Lambda(c)(2880)(+)
Belle Collaboration
2007
发表期刊PHYSICAL REVIEW LETTERS
卷号98期号:26
通讯作者Mizuk, R (reprint author), Inst Theoret & Expt Phys, Moscow 117259, Russia.
摘要We report the results of several studies of the Lambda(+)(c)pi(+)pi X- final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)->Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/ over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)->Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225 +/- 0.062 +/- 0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)->Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.
关键词QUARK-MODEL BARYONS STATES
学科领域Physics
DOI10.1103/PhysRevLett.98.262001
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000247625100013
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212822
专题实验物理中心
作者单位中国科学院高能物理研究所
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Belle Collaboration. Experimental constraints on the spin and parity of the Lambda(c)(2880)(+)[J]. PHYSICAL REVIEW LETTERS,2007,98(26).
APA Belle Collaboration.(2007).Experimental constraints on the spin and parity of the Lambda(c)(2880)(+).PHYSICAL REVIEW LETTERS,98(26).
MLA Belle Collaboration."Experimental constraints on the spin and parity of the Lambda(c)(2880)(+)".PHYSICAL REVIEW LETTERS 98.26(2007).
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