Fast computation of observed cross section for psi ' -> pp decays
文献类型：期刊论文
| 作者 | Wang Bo-Qun1,2,3; Mo Xiao-Hu3; Wang Ping3; Ban Yong1,2 |
| 刊名 | Chinese physics c
 |
| 出版日期 | 2011-05-01 |
| 卷号 | 35期号:5页码:411-418 |
| 关键词 | Cross section Narrow resonance Pseudoscalar pair E(+)e(-) collider |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/35/5/001 |
| 通讯作者 | Wang bo-qun(wangbq@ihep.ac.cn) |
| 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. |
| WOS关键词 | TAU-MASS MEASUREMENT ; RADIATIVE-CORRECTIONS ; J/PSI-DECAYS ; ANNIHILATION ; AMPLITUDES ; STRATEGY ; PSI(2S) ; PHASE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000290352800001 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176194 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang Bo-Qun |
| 作者单位 | 1.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Bo-Qun,Mo Xiao-Hu,Wang Ping,et al. Fast computation of observed cross section for psi ' -> pp decays[J]. Chinese physics c,2011,35(5):411-418. |
| APA | Wang Bo-Qun,Mo Xiao-Hu,Wang Ping,&Ban Yong.(2011).Fast computation of observed cross section for psi ' -> pp decays.Chinese physics c,35(5),411-418. |
| MLA | Wang Bo-Qun,et al."Fast computation of observed cross section for psi ' -> pp decays".Chinese physics c 35.5(2011):411-418. |
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来源：高能物理研究所
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