Fast computation of observed cross section for psi ' -> PP decays
Wang BQ(王博群); Mo XH(莫晓虎); 王平(实); Wang, BQ; Mo, XH; Wang, P; Ban, Y
刊名CHINESE PHYSICS C
2011
卷号35期号:5页码:411-418
关键词cross section narrow resonance pseudoscalar pair e(+)e(-) collider
学科分类Physics
DOI10.1088/1674-1137/35/5/001
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
文章类型Article
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.
类目[WOS]Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]Physics
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语种英语
WOS记录号WOS:000290352800001
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237371
专题中国科学院高能物理研究所_实验物理中心_期刊论文
中国科学院高能物理研究所_实验物理中心
中国科学院高能物理研究所_理论物理室
作者单位中国科学院高能物理研究所
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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.
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