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An iterative weighting method to apply ISR correction to e+e− hadronic cross-section measurements
Frontiers of Physics ( IF 7.5 ) Pub Date : 2021-06-05 , DOI: 10.1007/s11467-021-1085-6
Wenyu Sun , Tong Liu , Maoqiang Jing , Liangliang Wang , Bin Zhong , Weimin Song

Initial State Radiation (ISR) plays an important role in e+e collision experiments such as the BESIII. To correct the ISR effects in measurements of hadronic cross-sections of e+e annihilation, an iterative method that weights simulated ISR events is proposed here to assess the efficiency of event selection and the ISR correction factor for the observed cross-section. The simulated ISR events were generated only once, and the obtained cross-sectional line shape was used iteratively to weigh the same simulated ISR events to evaluate the efficiency and corrections until the results converge. Compared with the method of generating ISR events iteratively, the proposed weighting method provides consistent results, and reduces the computational time and disk space required by a factor of five or more, thus speeding-up e+e hadronic cross-section measurements.



中文翻译:

将 ISR 校正应用于 e+e− 强子截面测量的迭代加权方法

初始状态辐射 (ISR) 在e + e -碰撞实验(例如 BESIII )中起着重要作用。校正e + e强子截面测量中的 ISR 效应-湮灭是一种对模拟 ISR 事件进行加权的迭代方法,用于评估事件选择的效率和观察到的横截面的 ISR 校正因子。模拟的 ISR 事件仅生成一次,并迭代地使用获得的横截面线形状对相同的模拟 ISR 事件进行加权,以评估效率和修正,直到结果收敛。与迭代生成 ISR 事件的方法相比,所提出的加权方法提供了一致的结果,并将所需的计算时间和磁盘空间减少了五倍或更多,从而加快了e + e 强子截面测量。

更新日期:2021-06-05
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