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Spin-Parity Analysis of p(p)over-bar Mass Threshold Structure in J/psi and psi(3686) Radiative Decays
BESIII Callaboration
2012
发表期刊PHYSICAL REVIEW LETTERS
卷号108期号:11
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
摘要A partial wave analysis of the p (p) over bar mass-threshold enhancement in the reaction J/psi -> gamma p (p) over bar is used to determine its J(PC) quantum numbers to be 0(-+), its peak mass to be below threshold at M 1832(-5)(+19)(stat)(-17)(+18)(syst) +/- 19(model) MeV/c(2), and its total width to be Gamma < 76 MeV/c(2) at the 90% C. L. The product of branching ratios is measured to be BR[J/psi -> gamma X(p<(p)over bar>)]BR[X(p (p) over bar) -> p (p) over bar] = [9:0(-1.1)(+0.4)(stat)(-5.0)(+1:5)(syst) +/- 2: 3(model)] x 10(-5). A similar analysis performed on psi(3686) -> gamma p (p) over bar decays shows, for the first time, the presence of a corresponding enhancement with a production rate relative to that for J/psi decays of R = [5.08(-0.45)(+0: 71)(stat)(-058)(+0: 67) (syst) +/- 0: 12(model)%.
关键词ENHANCEMENT STATE
学科领域Physics
DOI10.1103/PhysRevLett.108.112003
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000301571200005
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被引频次:42[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/311005/213196
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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BESIII Callaboration. Spin-Parity Analysis of p(p)over-bar Mass Threshold Structure in J/psi and psi(3686) Radiative Decays[J]. PHYSICAL REVIEW LETTERS,2012,108(11).
APA BESIII Callaboration.(2012).Spin-Parity Analysis of p(p)over-bar Mass Threshold Structure in J/psi and psi(3686) Radiative Decays.PHYSICAL REVIEW LETTERS,108(11).
MLA BESIII Callaboration."Spin-Parity Analysis of p(p)over-bar Mass Threshold Structure in J/psi and psi(3686) Radiative Decays".PHYSICAL REVIEW LETTERS 108.11(2012).
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