Event generators for η/η' rare decays into π^+π^-1^+1^- and e^+e^-μ^+μ^-  

作　　者：张振宇 秦丽清 房双世 

机构地区：[1]College of Physics and Technology,Wuhan University [2]Guangxi Normal University [3]Institute of High Energy Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics C》2012年第10期926-931,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (NSFC) (11175189, 11105101, 10979008);100 Talents Program of Chinese Academy of Sciences (CAS) and Fundamental Research Funds for the Central Universities

摘　　要：Study of the rare and forbidden decays of η/η offers a sensitive probe to test fundamental symmetries of quantum chromodynamics and search for new physics beyond the Standard Model. To study the rare decays of η/η to π ＋ π - e ＋ e - , π ＋ π - μ ＋ μ - and e ＋ e - μ ＋ μ - at the BES detector, we developed several event generators based on the vector meson dominant model with finite-width corrections and the pseudoscalar mesons mixing theory. The various distributions from event generators are in good agreement with the theoretical predictions, which indicates that the event generators work very well after implemention in the BES Monte Carlo simulation package. In the BES physics analysis, the performance of the event generators will be improved in accordance with the distributions of different variables of η/η from data and the improvement on the theoretical calculations.Study of the rare and forbidden decays of η/η offers a sensitive probe to test fundamental symmetries of quantum chromodynamics and search for new physics beyond the Standard Model. To study the rare decays of η/η to π ＋ π - e ＋ e - , π ＋ π - μ ＋ μ - and e ＋ e - μ ＋ μ - at the BES detector, we developed several event generators based on the vector meson dominant model with finite-width corrections and the pseudoscalar mesons mixing theory. The various distributions from event generators are in good agreement with the theoretical predictions, which indicates that the event generators work very well after implemention in the BES Monte Carlo simulation package. In the BES physics analysis, the performance of the event generators will be improved in accordance with the distributions of different variables of η/η from data and the improvement on the theoretical calculations.

关 键 词：event generators rare decays of η/η the BES detector 

分 类 号：O571.3[理学—粒子物理与原子核物理]