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
文献类型：期刊论文
| 作者 | Liang, WH; Shen, PN; Zou, BS; Faessler, A |
| 刊名 | European physical journal a
 |
| 出版日期 | 2004-09-01 |
| 卷号 | 21期号:3页码:487-500 |
| ISSN号 | 1434-6001 |
| DOI | 10.1140/epja/i2004-10007-y |
| 通讯作者 | Liang, wh(shenpn@mail.ihep.ac.cn) |
| 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. |
| WOS关键词 | MESON-EXCHANGE MODEL ; PI-N SCATTERING ; HARMONIC-OSCILLATOR MODEL ; PHOTOPRODUCTION ; BARYONS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000224733800014 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175779 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Liang, WH |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China 2.China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China 3.Guangxi Normal Univ, Dept Phys, Guilin 541004, Peoples R China 4.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 5.Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany |
| 推荐引用方式 GB/T 7714 | 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 | Liang, WH,Shen, PN,Zou, BS,&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 | Liang, WH,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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