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：本文提出了一种高效生成多粒子系统蒙特卡洛相空间积分的新方法。通过以零质量粒子的解析精确积分作为比较函数，我们以极高的效率生成了重质量粒子的积分。因此，我们可以生成单位权重事件，模拟实际实验数据。事件生成分为两个独立步骤。首先，生成有效的质量，保持能量和动量守恒。随后，生成...