Nucleon-pole contributions in the J/psi -> N(N)over-bar pi, p(p)over-bar eta, p(p)over-bar eta ' and p(p)over-bar omega decays
Liang WH(梁伟红); Shen PN(沈彭年); Zou BS(邹冰松); Liang, WH; Shen, PN; Zou, BS; Faessler, A
刊名EUROPEAN PHYSICAL JOURNAL A
2004
卷号21期号:3页码:487-500
学科分类Physics
DOI10.1140/epja/i2004-10007-y
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China ; Guangxi Normal Univ, Dept Phys, Guilin 541004, Peoples R China ; Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China ; Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
文章类型Article
英文摘要Nucleon-pole contributions in the J/psi --> N (N) over bar pi, p (p) over bar eta, p (p) over bar eta' and p (p) over bar omega decays are re-studied. Different contributions due to PS-PS and PS-PV couplings in the pi-N interaction and the effects of NNpi form factors are investigated in the J/psi --> N (N) over bar pi decay channel. It is found that when the ratio of \F-0\/\F-M\ takes a small value, without considering the NNpi form factor, the difference between PS-PS and PS-PV couplings is negligible. However, when the NNpi form factor is included, this difference is greatly enlarged. The resultant decay widths are sensitive to the form factors. As a conclusion, the nucleon-pole contribution as a background to the decay width is important in the J/psi --> N (N) over bar pi decay and must be considered. In the J/psi --> N (N) over bar eta and N (N) over bar eta' decays, its contribution is smaller by 0.1% with respect to the data. In the J/psi --> N (N) over bar omega decay, it provides a rather important contribution without considering form factors. But the contribution is suppressed greatly when adding the off-shell form factors. Comparing these results with data will help us to select a proper form factor for such kind of decay.
类目[WOS]Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]Physics
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语种英语
WOS记录号WOS:000224733800014
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被引频次:21[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/311005/237683
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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Liang WH,Shen PN,Zou BS,et al. Nucleon-pole contributions in the J/psi -> N(N)over-bar pi, p(p)over-bar eta, p(p)over-bar eta ' and p(p)over-bar omega decays[J]. EUROPEAN PHYSICAL JOURNAL A,2004,21(3):487-500.
APA 梁伟红.,沈彭年.,邹冰松.,Liang, WH.,Shen, PN.,...&Faessler, A.(2004).Nucleon-pole contributions in the J/psi -> N(N)over-bar pi, p(p)over-bar eta, p(p)over-bar eta ' and p(p)over-bar omega decays.EUROPEAN PHYSICAL JOURNAL A,21(3),487-500.
MLA 梁伟红,et al."Nucleon-pole contributions in the J/psi -> N(N)over-bar pi, p(p)over-bar eta, p(p)over-bar eta ' and p(p)over-bar omega decays".EUROPEAN PHYSICAL JOURNAL A 21.3(2004):487-500.
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