Fast computation of observed cross section for psi ' -> PP decays
文献类型：期刊论文
| 作者 | Wang BQ(王博群) ; Mo XH(莫晓虎); 王平(实); Wang, BQ; Mo, XH; Wang, P; Ban, Y
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| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2011 |
| 卷号 | 35期号:5页码:411-418 |
| 关键词 | cross section narrow resonance pseudoscalar pair e(+)e(-) collider |
| 通讯作者 | [Wang Bo-Qun ; Ban Yong] Peking Univ, Sch Phys, Beijing 100871, Peoples R China ; [Wang Bo-Qun ; Ban Yong] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China ; [Wang Bo-Qun ; Mo Xiao-Hu ; Wang Ping] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
| 英文摘要 | It has been conjectured that the relative phase between strong and electromagnetic amplitudes is universally -90 degrees in charmonium decays. psi ' decaying into a pseudoscalar pair provides a possibility to test this conjecture. However, the experimentally observed cross section for such a process is depicted by the two-fold integral, which takes into account the initial state radiative (ISR) correction and energy spread effect. Using the generalized linear regression approach, a complex energy-dependent factor is approximated by a linear function of energy. Taking advantage of this simplification, the integration of ISR correction can be performed and an analytical expression with accuracy at the level of 1% is obtained. Then, the original two-fold integral is simplified into a one-fold integral, which reduces the total computing time by two orders of magnitude. Such a simplified expression for the observed cross section usually plays an indispensable role in the optimization of scan data taking, the determination of systematic uncertainty, and the analysis of data correlation. |
| 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:000290352800001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237371]  |
| 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 | Wang BQ,Mo XH,Wang P,et al. Fast computation of observed cross section for psi ' -> PP decays[J]. CHINESE PHYSICS C,2011,35(5):411-418. |
| APA | 王博群.,莫晓虎.,王平.,Wang, BQ.,Mo, XH.,...&Ban, Y.(2011).Fast computation of observed cross section for psi ' -> PP decays.CHINESE PHYSICS C,35(5),411-418. |
| MLA | 王博群,et al."Fast computation of observed cross section for psi ' -> PP decays".CHINESE PHYSICS C 35.5(2011):411-418. |
入库方式： OAI收割
来源：高能物理研究所
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