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Precision measurements of the mass, the widths of psi(3770) resonance and the cross section sigma[e(+)e(-)->psi(3770)] at E-cm=3.7724 GeV
BES Collaboration
2007
发表期刊PHYSICS LETTERS B
卷号652期号:5-6页码:#REF!
通讯作者Rong, G (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
文章类型Article
摘要By analyzing the R values measured at 68 energy points in the energy region between 3.650 and 3.872 GeV reported in our previous paper, we have precisely measured the mass, the total width and the leptonic width of the psi (3770) resonance to be M-psi (3770) = 3772.4 +/- 0.4 +/- 0.3 MeV, Gamma(tot)(psi(3770)) = 28.5 +/- 1.2 +/- 0.2 MeV and Gamma(ee)(psi(3770)) = 277 +/- 11 +/- 13 eV, respectively. We have measured the leptonic branching fraction of the psi (3770) of the psi (3770) production cross section at its peak to be B[psi (3770) -> e(+) e(-)] = (0.97 +/- 0.03 +/- 0.05) x 10(-5) and sigma(prd) [e(+) e(-) -> psi (3770)] = 10.0 +/- 0.3 +/- 0.5 nb, respectively. The latter one results in the corresponding observed cross section of sigma(obs)[e(+) e(-) -> psi (3770)] = 7.2 +/- 0.2 +/- 0.4 nb. We have also measured R-uds = 2.121 +/- 0.023 +/- 0.084 for the continuum light hadron production in the region from 3.650 to 3.872 GeV. (c) 2007 Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2007.06.074
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000249488600006
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被引频次:24[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/311005/227127
专题实验物理中心
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BES Collaboration. Precision measurements of the mass, the widths of psi(3770) resonance and the cross section sigma[e(+)e(-)->psi(3770)] at E-cm=3.7724 GeV[J]. PHYSICS LETTERS B,2007,652(5-6):#REF!.
APA BES Collaboration.(2007).Precision measurements of the mass, the widths of psi(3770) resonance and the cross section sigma[e(+)e(-)->psi(3770)] at E-cm=3.7724 GeV.PHYSICS LETTERS B,652(5-6),#REF!.
MLA BES Collaboration."Precision measurements of the mass, the widths of psi(3770) resonance and the cross section sigma[e(+)e(-)->psi(3770)] at E-cm=3.7724 GeV".PHYSICS LETTERS B 652.5-6(2007):#REF!.
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