IHEP OpenIR  > 实验物理中心
Measurements of the branching fractions for J/psi and psi ' -> Lambda(Lambda)over-bar pi(0) and Lambda(Lambda)over-bar eta
BESIII Callaboration
2013
发表期刊PHYSICAL REVIEW D
卷号87期号:5
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
摘要We report on a study of the isospin-violating and isospin-conserving decays of the J/psi and psi' charmonium state to Lambda(Lambda) over bar pi(0) and Lambda(Lambda) over bar eta, respectively. The data are based on 225 million J/psi and 106 million psi' events that were collected with the BESIII detector. The most accurate measurement of the branching fraction of the isospin-violating process J/psi -> Lambda(Lambda) over bar pi(0) is obtained, and the isospin-conserving processes J/psi -> Lambda(Lambda) over bar eta and psi' -> Lambda(Lambda) over bar eta are observed for the first time. The branching fractions are measured to be B(J/psi -> Lambda(Lambda) over bar pi(0)) = (3.78 +/- 0.27(stat) +/- 0.30(sys)) x 10(-5), B(J/psi -> Lambda(Lambda) over bar eta) = (15.7 +/- 0.80(stat) +/- 1.54(sys)) x 10(-5) and B(psi' -> Lambda(Lambda) over bar eta) = (2.48 +/- 0.34(stat) +/- 0.19(sys)) x 10(-5). No significant signal events are observed for psi' -> Lambda(Lambda) over bar pi(0) decay resulting in an upper limit of the branching fraction of B(psi' -> Lambda(Lambda) over bar pi(0)) < 0.29 x 10(-5) at the 90% confidence level. The two-body decay of J/psi -> Sigma(1385)(0)<(Lambda)over bar> + c.c. is searched for, and the upper limit is B(J/psi -> Sigma(1385)(0)(Lambda) over bar + c.c.) < 0.82 x 10(-5) at the 90% confidence level. DOI: 10.1103/PhysRevD.87.052007
关键词DECAYS PUZZLE
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.87.052007
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000315737200002
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213484
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
BESIII Callaboration. Measurements of the branching fractions for J/psi and psi ' -> Lambda(Lambda)over-bar pi(0) and Lambda(Lambda)over-bar eta[J]. PHYSICAL REVIEW D,2013,87(5).
APA BESIII Callaboration.(2013).Measurements of the branching fractions for J/psi and psi ' -> Lambda(Lambda)over-bar pi(0) and Lambda(Lambda)over-bar eta.PHYSICAL REVIEW D,87(5).
MLA BESIII Callaboration."Measurements of the branching fractions for J/psi and psi ' -> Lambda(Lambda)over-bar pi(0) and Lambda(Lambda)over-bar eta".PHYSICAL REVIEW D 87.5(2013).
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1200.pdf(5083KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[BESIII Callaboration]的文章
百度学术
百度学术中相似的文章
[BESIII Callaboration]的文章
必应学术
必应学术中相似的文章
[BESIII Callaboration]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。