Evidence of sigma particle in J/psi ->omega pi(+)pi(-) decay
文献类型：期刊论文
| 作者 | BES Callaboration |
| 刊名 | HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
 |
| 出版日期 | 2004 |
| 卷号 | 28期号:3页码:215-221 |
| 关键词 | PI-PI-SCATTERING PHASE-SHIFT COLLISIONS STATES LIGHT |
| 通讯作者 | Bai, JZ (reprint author), CAS, Inst High Energy Phys, Beijing 100039, Peoples R China. |
| 英文摘要 | Based on a sample of 7.8 x 10(6) BESI J/psi events, the decay of J/psi -wpi(+) pi (-) is studied. A low mass enhancement in the pi(+) pi(-) invariant mass spectrum recoiling against omega particle is clearly seen which does not come from the phase space effect and the background. According to PWA analysis, this low mass enhancement is a broad 0(++) resonance, the sigma particle. If a Baeit-Winger function of constant width is used to fit the sigma signal, its mass and width are 384 +/- 66 MeV and 458 +/- 100 MeV respectively, which correspond to the pole position at (434 +/- 78)-i(202 +/- 43) MeV. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000220242500001 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212369]  |
| 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. Evidence of sigma particle in J/psi ->omega pi(+)pi(-) decay[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2004,28(3):215-221. |
| APA | BES Callaboration.(2004).Evidence of sigma particle in J/psi ->omega pi(+)pi(-) decay.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,28(3),215-221. |
| MLA | BES Callaboration."Evidence of sigma particle in J/psi ->omega pi(+)pi(-) decay".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 28.3(2004):215-221. |
入库方式： OAI收割
来源：高能物理研究所
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