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Observation of e(+)e(-) -> eta J/psi at center-of-mass energy root s=4.009 GeV
BESIII Callaboration
2012
发表期刊PHYSICAL REVIEW D
卷号86期号:7
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
摘要Using a 478 pb(-1) data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring at a center-of-mass energy of root s = 4.009 GeV, the production of e(+)e(-) -> eta J/psi is observed for the first time with a statistical significance of greater than 10 sigma. The Born cross section is measured to be (32.1 +/- 2.8 +/- 1.3) pb, where the first error is statistical and the second systematic. Assuming the eta J/psi signal is from a hadronic transition of the psi(4040), the fractional transition rate is determined to be B(psi(4040) -> eta J/psi) = (5.2 +/- 0.5 +/- 0.2 +/- 0.5) x 10(-3), where the first, second, and third errors are statistical, systematic, and the uncertainty from the psi(4040) resonant parameters, respectively. The production of e(+)e(-) -> pi(0)J/psi is searched for, but no significant signal is observed, and B(psi(4040) -> pi(0)J/psi) < 2.8 x 10(-4) is obtained at the 90% confidence level.
关键词ANNIHILATION
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.86.071101
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000309346800001
引用统计
被引频次:26[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/311005/213334
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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BESIII Callaboration. Observation of e(+)e(-) -> eta J/psi at center-of-mass energy root s=4.009 GeV[J]. PHYSICAL REVIEW D,2012,86(7).
APA BESIII Callaboration.(2012).Observation of e(+)e(-) -> eta J/psi at center-of-mass energy root s=4.009 GeV.PHYSICAL REVIEW D,86(7).
MLA BESIII Callaboration."Observation of e(+)e(-) -> eta J/psi at center-of-mass energy root s=4.009 GeV".PHYSICAL REVIEW D 86.7(2012).
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