标题:OBSERVATION OF A P MASS THRESHOLD ENHANCEMENT IN Ψ′→Π+Π-J/Ψ(J/Ψ→ΓP) DECAY
作者:麦迪娜;M. N. ACHASOV;安磊;安琪;安正华;白景芝;班勇;N. BERGER;边渐鸣;I. BOYKO;R. A. BRIERE;V. BYTEV;蔡啸;曹国富;曹学香;常劲帆;G. CHELKOV;陈刚;陈和生;陈江 更多
作者机构:[Ablikim, M] Institute of High Energy Physics, CAS, Beijing 100049, China;[ Achasov, M.N] G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Nov 更多
通讯作者地址:[Ablikim, M]CAS, Inst High Energy Phys, Beijing 100049, Peoples R China.
来源:中国物理C
出版年:2010
卷:34
期:4
页码:421-426
关键词:p(p);threshold enhancement
摘要:The decay channel ψ′→π~+π~-J/ψ(J/ψ→γp(p)) is studied using a sample of 1.06 × 10~8 ψ′ events collected by the BESⅢ experiment at BEPCⅡ. A strong enhancement at threshold is observed in the p(p) invariant mass spectrum. The enhancement can be fitted with an S-wave Breit-Wigner resonance function with a resulting peak mass of M = 1861_(-13)~(+6) (stat)_(-26)~(+7) (syst) MeV/c~2 and a narrow width that is Γ< 38 MeV/c~2 at the 90% confidence level. These results are consistent with published BESⅡ results. These mass and width values do not match with well established mesons.
收录类别:SCOPUS;CSCD;SCOPUS;SCIE
WOS核心被引频次:32
Scopus被引频次:35
最新影响因子:5.084
当年影响因子:0.266
JCR分区(WOS):Q4
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-77951825254&doi=10.1088%2f1674-1137%2f34%2f4%2f001&partnerID=40&md5=908ff409b33bdd820188d0d29a8c7e66
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