p(p)over-bar final state interaction in J/psi -> gamma p(p)over-tilde

	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
刊名	CHINESE PHYSICS C
	2012
卷号	36 期号:5 页码:399-402
关键词	near-threshold enhancement final state interaction one pion exchange potential Jost function
英文摘要	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.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000303781900004
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223969]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	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.