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Observation of psi(4040) and psi(4160) decay into eta J/psi
Belle Collaboration
2013
发表期刊PHYSICAL REVIEW D
卷号87期号:5
通讯作者Wang, XL (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.
摘要The cross section for e(+)e(-) -> eta J=psi between root s=3.8 GeV and 5.3 GeV is measured via initial state radiation using 980 fb(-1) of data on and around the Upsilon(nS)(n=1, 2, 3, 4, 5) resonances collected with the Belle detector at KEKB. Two resonant structures at the psi(4040) and psi(4160) are observed in the (eta)J/psi invariant mass distribution. Fitting the mass spectrum with the coherent sum of two Breit-Wigner functions, one obtains B(psi(4040) -> (eta)J/psi)(.)Gamma(psi(4040))(e+e-) = (4.8 +/- 0.9 +/- 1.5) eV and B(psi(4160) -> (eta)J/psi(.)Gamma(psi(4160))(e+e-) = 4.0 +/- 0.8 +/- 1.4) eV for one solution and B(psi(4040) -> (eta)J/psi)(.)Gamma(psi(4040))(e+e-) = (11.2 +/- 1.3 +/- 2.1) eV and B(psi(4160) -> (eta)J/psi)(.)Gamma(psi(4160))(e+e-) = 13.8 +/- 1.3 +/- 2.1 eV for the other solution, where the first errors are statistical and the second are systematic. This is the first measurement of this hadronic transition mode of these two states, and the partial widths to (eta)J/psi are found to be about 1 MeV. There is no evidence for the Y(4260), Y(4360), psi(4415), or Y(4660) in the (eta)J/psi final state, and upper limits of their production rates in e(+)e(-) annihilation are determined. DOI: 10.1103/PhysRevD.87.051101
关键词CROSS-SECTION BELLE IDENTIFICATION ANNIHILATION KEKB
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.87.051101
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000316416500001
引用统计
被引频次:37[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/311005/213489
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. Observation of psi(4040) and psi(4160) decay into eta J/psi[J]. PHYSICAL REVIEW D,2013,87(5).
APA Belle Collaboration.(2013).Observation of psi(4040) and psi(4160) decay into eta J/psi.PHYSICAL REVIEW D,87(5).
MLA Belle Collaboration."Observation of psi(4040) and psi(4160) decay into eta J/psi".PHYSICAL REVIEW D 87.5(2013).
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