Observation of a Charged Charmoniumlike Structure in e(+)e(-) -> pi(+)pi(-) J/psi at root s=4.26 GeV
BESIII Callaboration
刊名PHYSICAL REVIEW LETTERS
2013
卷号110期号:25
学科分类Physics
DOI10.1103/PhysRevLett.110.252001
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
英文摘要We study the process e(+)e(-) -> pi(+)pi(-) J/psi at a center-of-mass energy of 4.260 GeV using a 525 pb(-1) data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross section is measured to be (62.9 +/- 1.9 +/- 3.7) pb, consistent with the production of the Y(4260). We observe a structure at around 3.9 GeV/c(2) in the pi(+/-) J/psi mass spectrum, which we refer to as the Z(c)(3900). If interpreted as a new particle, it is unusual in that it carries an electric charge and couples to charmonium. A fit to the pi(+/-) J/psi invariant mass spectrum, neglecting interference, results in a mass of (3899.0 +/- 3.6 +/- 4.9) MeV/c(2) and a width of (46 +/- 10 +/- 20) MeV. Its production ratio is measured to be R = (sigma(e(+)e(-) -> pi(+/-) Z(c)(3900)(-/+) -> pi(+)pi(-) J/psi)/sigma(e(+)e(-) -> pi(+)pi(-) J/psi)) = (21.5 +/- 3.3 +/- 7.5)%. In all measurements the first errors are statistical and the second are systematic.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
语种英语
WOS记录号WOS:000320613800004
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被引频次:338[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/311005/213552
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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BESIII Callaboration. Observation of a Charged Charmoniumlike Structure in e(+)e(-) -> pi(+)pi(-) J/psi at root s=4.26 GeV[J]. PHYSICAL REVIEW LETTERS,2013,110(25).
APA BESIII Callaboration.(2013).Observation of a Charged Charmoniumlike Structure in e(+)e(-) -> pi(+)pi(-) J/psi at root s=4.26 GeV.PHYSICAL REVIEW LETTERS,110(25).
MLA BESIII Callaboration."Observation of a Charged Charmoniumlike Structure in e(+)e(-) -> pi(+)pi(-) J/psi at root s=4.26 GeV".PHYSICAL REVIEW LETTERS 110.25(2013).
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