Event generators for η/η’ rare decays into π~+π~-1~+1~- and e~+e~-μ~+μ~-

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.     

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

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 BESⅢ 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 BESⅢ Monte Carlo simulation package. In the BESⅢ 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.     

光栅衍射的微课视频设计与制作

信息技术的发展不断促进教育模式的变革,基于互联网的微课教学可谓是近年的热门教学模式。大学物理实验是物理学专业学生的一门重要课程,但其传统授课方式存在不足。将微课与大学物理实验教学结合起来,不但能提升教学效果,还能提高学生的学习主动性。光栅衍射在光学课程中处于重要地位,学生在理论学习中只理解了光栅衍射的原理,对于其应用不太熟悉。本文从教学设计、课件制作、脚本设计、视频制作方面介绍了光栅衍射的微课视频设计与制作过程,对探索大学物理实验教学新模式有一定意义。