Observation of two new N* peaks in J/psi -> p pi- (n)over-bar and p pi+ (n)over-bar decays
文献类型：期刊论文
| 作者 | BES Callaboration |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2006 |
| 卷号 | 97期号:6 |
| 关键词 | J/PSI P(P)OVER-BAR-ETA DETECTOR BARYONS NUCLEON MODEL |
| 通讯作者 | Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100039, Peoples R China. |
| 英文摘要 | The decay J/psi ->(N) over barN pi provides an effective isospin 1/2 filter for the pi N system due to isospin conservation. Using 58x10(6) J/psi decays collected with the Beijing Electromagnetic Spectrometer at the Beijing Electron Positron Collider, more than 100 thousand J/psi -> p pi(-)<<(n)over bar>+c.c. events are obtained. Besides the two well-known N-* peaks at around 1500 MeV/c(2) and 1670 MeV/c(2), there are two new, clear N-* peaks in the p pi invariant mass spectrum around 1360 MeV/c(2) and 2030 MeV/c(2) with statistical significance of 11 sigma and 13 sigma, respectively. We identify these as the first direct observation of the N-*(1440) peak and a long-sought missing N-* peak above 2 GeV/c(2) in the pi N invariant mass spectrum. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239690900012 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212705]  |
| 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 | BES Callaboration. Observation of two new N* peaks in J/psi -> p pi- (n)over-bar and p pi+ (n)over-bar decays[J]. PHYSICAL REVIEW LETTERS,2006,97(6). |
| APA | BES Callaboration.(2006).Observation of two new N* peaks in J/psi -> p pi- (n)over-bar and p pi+ (n)over-bar decays.PHYSICAL REVIEW LETTERS,97(6). |
| MLA | BES Callaboration."Observation of two new N* peaks in J/psi -> p pi- (n)over-bar and p pi+ (n)over-bar decays".PHYSICAL REVIEW LETTERS 97.6(2006). |
入库方式： OAI收割
来源：高能物理研究所
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