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Measurement of e(+)e(-) -> pi(+)pi(-)psi(2S) via initial state radiation at Belle
Belle Collaboration
2015
发表期刊PHYSICAL REVIEW D
卷号91期号:11页码:112007
摘要We report measurement of the cross section of e(+)e(-) -> pi(+)pi(-)psi(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980 fb(-1) data sample recorded with the Belle detector. The properties of the Y(4360) and Y(4660) states are determined. Fitting the mass spectrum of pi(+)pi(-)psi(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: M-Y(4360) = (4347 +/- 6 +/- 3) MeV/c(2), Gamma(Y(4360)) = (103 +/- 9 +/- 5) MeV, M-Y(4660) = (4652 +/- 10 +/- 8) MeV/c(2), Gamma(Y(4660)) = (68 +/- 11 +/- 1) MeV; and B[Y(4360) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (10.9 +/- 0.6 +/- 0.7) eV and B[Y(4660) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (8.1 +/- 1.1 +/- 0.5) eV for one solution; or B[Y(4360) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (9.2 +/- 0.6 +/- 0.6) eV and B[Y(4660) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (2.0 +/- 0.3 +/- 0.2) eV for the other. Here, the first errors are statistical and the second systematic. Evidence for a charged charmoniumlike structure at 4.05 GeV/c(2) is observed in the pi(+/-)psi(2S) intermediate state in the Y(4360) decays.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.112007
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000356135800001
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被引频次:39[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/311005/228432
专题实验物理中心
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Belle Collaboration. Measurement of e(+)e(-) -> pi(+)pi(-)psi(2S) via initial state radiation at Belle[J]. PHYSICAL REVIEW D,2015,91(11):112007.
APA Belle Collaboration.(2015).Measurement of e(+)e(-) -> pi(+)pi(-)psi(2S) via initial state radiation at Belle.PHYSICAL REVIEW D,91(11),112007.
MLA Belle Collaboration."Measurement of e(+)e(-) -> pi(+)pi(-)psi(2S) via initial state radiation at Belle".PHYSICAL REVIEW D 91.11(2015):112007.
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