Study of K-s(0) reconstruction and lifetime measurement at BES II
文献类型：期刊论文
| 作者 | Wang Z(王喆); Yuan Y(袁野) ; Zhang ZC(张长城); Wang, Z; Yuan, Y; Zhang, CC
|
| 刊名 | HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
 |
| 出版日期 | 2003 |
| 卷号 | 27期号:1页码:1-6 |
| 关键词 | primary vertex secondary vertex lifetime measurement |
| 其他题名 | K-s(0) 重建及其寿命测量在BESII上的研究 |
| 通讯作者 | Wang, Z (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China. |
| 英文摘要 | The beam collision center of the BEPC has slightly shifted from geometrical origin of the BES detector and the beam bunch of the BEPC also has certain size. For these reasons, to measure K-s(0) lifetime, primary vertex reconstruction must be carried out. After the investigation of di-muon bhabha and hadron events, the beam collision center for each run is determined by bhabha and di-muon events. For the large branching ratio of J/ -->K-s(0), K-*0-->K+/- pi(-/+): pi(+) pi(-) and the existence of the resonance of K (*0), this channel is chosen to provide much pure K-s(0) signal. With the aid of M. C. tools at BES U, existing software for secondary vertex reconstruction is adjusted and improved. A new method of secondary vertex determination is used and a better position resolution of secondary vertex is obtained. The lifetime of K-s(0) is measured with channel J/ -->K-s(0), K-*0 and the inclusive K-s(0) mass is investigated with BES parallel to 's 50M J/ data sample, which give consistent K-s(0) lifetime and mass with PDG's value within error. 1C fit on K-s(0) mass is also studied with M. C. events. The resolution of momentum and energy of pi(+) pi(-) and K-s(0) is improved too. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI |
| WOS记录号 | WOS:000180568600002 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/225404]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 推荐引用方式 GB/T 7714 | Wang Z,Yuan Y,Zhang ZC,et al. Study of K-s(0) reconstruction and lifetime measurement at BES II[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2003,27(1):1-6. |
| APA | 王喆,袁野,张长城,Wang, Z,Yuan, Y,&Zhang, CC.(2003).Study of K-s(0) reconstruction and lifetime measurement at BES II.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,27(1),1-6. |
| MLA | 王喆,et al."Study of K-s(0) reconstruction and lifetime measurement at BES II".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 27.1(2003):1-6. |
入库方式： OAI收割
来源：高能物理研究所
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