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p(p)over-bar final state interaction in J/psi -> gamma p(p)over-tilde
Zeng, ZQ; Guo, XH; 沈彭年;Shen, PN; Ding, YB
2012
发表期刊CHINESE PHYSICS C
卷号36期号:5页码:399-402
摘要The phenomenon of the near p (p) over bar -threshold enhancement observed in the J/psi -> gamma p (p) over bar decay is studied by using the enhancement factor method with a simpler one-pion-exchange potential between p and (p) over bar. The Jost function caused by the mentioned potential is perturbatively calculated in the zero-th order approximation, and the corresponding enhancement. factor is obtained. It is found that such a final state interaction offers an important contribution to the decay width near the p (p) over bar -threshold, although it is not large enough. To explain the decay data, a phenomenological factor G(p) with the form of 285500/(m(pi)(2) + p(2)) should be introduced. A further calculation including the p-dependent bare T-matrix, a more realistic N (N) over bar potential and the contribution from the higher-order wave functions would provide a better understanding of the decay data and even the existence of the baryonium p (p) over bar. The near p (p) over bar -threshold behavior of the decay width in the J/psi -> pi(0) p (p) over bar process is also discussed.
关键词near-threshold enhancement final state interaction one pion exchange potential Jost function
学科领域Physics
DOI10.1088/1674-1137/36/5/004
收录类别SCI
WOS记录号WOS:000303781900004
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被引频次:1[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/311005/223969
专题理论物理室
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Zeng, ZQ,Guo, XH,沈彭年;Shen, PN,et al. p(p)over-bar final state interaction in J/psi -> gamma p(p)over-tilde[J]. CHINESE PHYSICS C,2012,36(5):399-402.
APA Zeng, ZQ,Guo, XH,沈彭年;Shen, PN,&Ding, YB.(2012).p(p)over-bar final state interaction in J/psi -> gamma p(p)over-tilde.CHINESE PHYSICS C,36(5),399-402.
MLA Zeng, ZQ,et al."p(p)over-bar final state interaction in J/psi -> gamma p(p)over-tilde".CHINESE PHYSICS C 36.5(2012):399-402.
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