Monte Carlo phase space evaluation

Abstract A new, efficient method of generating Monte Carlo phase space integrals for multi-particle systems is derived. By using the analytically exact integrals for zero-mass particles as a comparison function, we generate the integrals for massive particles with an extremely high efficiency. We thus can generate unit weight events, simulating actual experimental data. The events are generated in two distinct steps. First, effective masses, conserving energy and momentum are generated. Next, the effe... Title of program: NUPHAZ Catalogue Id: ACGJ_v1_0 Nature of problem Generation of multiparticle events distributed randomly and uniformly in Lorentz-invariant phase space. Versions of this program held in the CPC repository in Mendeley Data ACGJ_v1_0; NUPHAZ; 10.1016/0010-4655(92)90183-Y This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)摘要 本文推导了一种全新且高效的多粒子系统蒙特卡洛（Monte Carlo）相空间积分生成方法。我们以零质量粒子的解析精确积分作为对比函数，以极高的效率生成了有质量粒子的相空间积分，进而可生成单位权重事例，模拟真实实验数据。事例生成分为两个独立步骤：首先生成满足能量与动量守恒的有效质量；随后…… 程序名称：NUPHAZ 目录编号：ACGJ_v1_0 问题性质 生成随机均匀分布于洛伦兹不变（Lorentz-invariant）相空间的多粒子事例。 门捷列夫数据（Mendeley Data）中CPC程序库收录的该程序版本 ACGJ_v1_0; NUPHAZ; 10.1016/0010-4655(92)90183-Y 本程序源自贝尔法斯特女王大学所持有的CPC程序库（1969-2019年）