Observation of p(p)over-bar, p(Lambda)over-bar, K-(Lambda)over-bar near-threshold enhancement at BES
文献类型：期刊论文
| 作者 | Yang HX(杨洪勋) ; Yang, HX
|
| 刊名 | INTERNATIONAL JOURNAL OF MODERN PHYSICS A
 |
| 出版日期 | 2005 |
| 卷号 | 20期号:8-9页码:1985-1989 |
| 关键词 | J/psi decays near-threshold enhancement |
| 通讯作者 | Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 英文摘要 | We observe a narrow enhancement near 2m(p) in the invariant mass spectrum of pp pairs from radiative J/ψ &RARR; γ pp decays. In the case of S-wave fit, the peak mass is below 2m(p) at M = 1859(-10)(+3)(stat)(-25)(+5) (syst)MeV and the total width is &UGamma; < 30MeV at the 90% confidence level. And we also find near-threshold enhancement in the invariant mass spectrum of p&ULambda;+c.c. in J/ψ pK(-)&ULambda;+c.c. decays. The mass is m = 2075 &PLUSMN; 12(stat) &PLUSMN; 5(syst)MeV and width is &UGamma; = 90 &PLUSMN; 35(stat) &PLUSMN; 9(syst)MeV. A K-&ULambda; near-threshold enhancement is also studied and it has m = 1.50 &SIM; 1.65GeV, &UGamma; = 70 &SIM; 110MeV with BR(J/ψ &RARR; pN*(X)) x BR(N*(X) &RARR; K&ULambda;) &SIM; 2 x 10(-4). |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000229085600086 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239607]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Yang HX,Yang, HX. Observation of p(p)over-bar, p(Lambda)over-bar, K-(Lambda)over-bar near-threshold enhancement at BES[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2005,20(8-9):1985-1989. |
| APA | 杨洪勋,&Yang, HX.(2005).Observation of p(p)over-bar, p(Lambda)over-bar, K-(Lambda)over-bar near-threshold enhancement at BES.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,20(8-9),1985-1989. |
| MLA | 杨洪勋,et al."Observation of p(p)over-bar, p(Lambda)over-bar, K-(Lambda)over-bar near-threshold enhancement at BES".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 20.8-9(2005):1985-1989. |
入库方式： OAI收割
来源：高能物理研究所
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