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Observation of Y(2175) in J/psi ->eta phi f(0)(980)
BES Collaboration
2008
发表期刊PHYSICAL REVIEW LETTERS
卷号100期号:10页码:102003
文章类型Article
摘要The decays of J/psi ->eta phi f(0)(980)[eta ->gamma gamma, phi -> K+K-, f(0)(980)->pi(+)pi(-)] are analyzed using a sample of 5.8x10(7) J/psi events collected with the BESII detector at the Beijing Electron-Positron Collider. A structure at around 2.18 GeV/c(2) with about 5 sigma significance is observed in the phi f(0)(980) invariant mass spectrum. A fit with a Breit-Wigner function gives the peak mass and width of m=2.186 +/- 0.010(stat)+/- 0.006(syst) GeV/c(2) and Gamma=0.065 +/- 0.023(stat)+/- 0.017(syst) GeV/c(2), respectively, which are consistent with those of Y(2175), observed by the BABAR Collaboration in the initial-state radiation process e(+)e(-)->gamma(ISR)phi f(0)(980). The production branching ratio is determined to be Br(J/psi ->eta Y(2175))Br(Y(2175)->phi f(0)(980))Br(f(0)(980)->pi(+)pi(-))=[3.23 +/- 0.75(stat)+/- 0.73(syst)]x 10(-4), assuming that the Y(2175) is a 1(--) state.
学科领域Physics
DOI10.1103/PhysRevLett.100.102003
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000254024500014
引用统计
被引频次:57[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/311005/227955
专题实验物理中心
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BES Collaboration. Observation of Y(2175) in J/psi ->eta phi f(0)(980)[J]. PHYSICAL REVIEW LETTERS,2008,100(10):102003.
APA BES Collaboration.(2008).Observation of Y(2175) in J/psi ->eta phi f(0)(980).PHYSICAL REVIEW LETTERS,100(10),102003.
MLA BES Collaboration."Observation of Y(2175) in J/psi ->eta phi f(0)(980)".PHYSICAL REVIEW LETTERS 100.10(2008):102003.
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