Photos — a universal Monte Carlo for QED radiative corrections in decays

Abstract In this paper we present an algorithm for the Monte Carlo simulation of QED single-photon radiative corrections in decays. The algorithm is implemented in an independent package written in FORTRAN 77. The program is universal, i.e. it allows for easy interfacing with “any” program generating decays of “any” particle. The program can be used to estimate the size of the QED bremsstrahlung in the leading-logarithmic (collinear) approximation. The proper soft-photon behavior is also reproduced. T... Title of program: PHOTOS version 1.3 Catalogue Id: ABZI_v1_0 Nature of problem Most of the decay modes of particles or resonances are accompanied by the QED real photon corrections. The presence of a hard photon may affect shape of the measured distributions, detection efficiencies and/ or experimental selection criteria. Versions of this program held in the CPC repository in Mendeley Data ABZI_v1_0; PHOTOS version 1.3; 10.1016/0010-4655(91)90012-A ABZI_v2_0; PHOTOS, version: 2.0; 10.1016/0010-4655(94)90074-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

**摘要**
本文提出一种用于粒子衰变过程中量子电动力学（Quantum Electrodynamics, QED）单光子辐射修正的蒙特卡洛模拟算法。该算法以FORTRAN 77语言编写为独立软件包实现。本程序具备通用性，可便捷对接任意生成任意粒子衰变过程的程序。其可用于在领头对数（共线）近似下估算QED韧致辐射的量级，同时可正确再现软光子行为。T...

**程序名称**：PHOTOS 版本1.3
**目录编号**：ABZI_v1_0
**适用问题**
绝大多数粒子或共振态的衰变道均伴随QED真实光子修正。硬光子的存在可能会影响测量分布的形状、探测效率以及/或实验选择判据。

**曼德列数据（Mendeley Data）收录的《计算机物理通讯》（Computer Physics Communications, CPC）程序库中本程序版本如下**：
ABZI_v1_0；PHOTOS 版本1.3；10.1016/0010-4655(91)90012-A
ABZI_v2_0；PHOTOS 版本2.0；10.1016/0010-4655(94)90074-4

本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2018）。