PHOTOS interface in C++ Technical and physics documentation

Abstract For five years now, PHOTOS Monte Carlo for bremsstrahlung in the decay of particles and resonances has been available with an interface to the C++ HepMC event record. The main purpose of the present paper is to document the technical aspects of the PHOTOS Monte Carlo installation and present version use. A multitude of test results and examples are distributed together with the program code. The PHOTOS C++ physics precision is better than its FORTRAN predecessor and more convenient steering ... Title of program: Photos++ Catalogue Id: AEYF_v1_0 Nature of problem Algorithm described in this paper can be used to add final state radiation to the event generated by external software using selected event record format. It can also be used on a sample of events loaded from data file. User can define parts of the decay tree on which algorithm can be invoked. The influence of the next-to-leading-order corrections, along with other options regarding electron-positron pair, muon pair and photon emission, can be studied. Versions of this program held in the CPC repository in Mendeley Data AEYF_v1_0; Photos++; 10.1016/j.cpc.2015.09.013 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)摘要 近五年来，针对粒子与共振态衰变中韧致辐射的PHOTOS蒙特卡洛（Monte Carlo）程序，已支持与C++格式的HepMC事件记录接口。本文的核心目的在于对PHOTOS蒙特卡洛程序的安装技术细节与当前版本的使用方法进行文档化说明。程序代码随附了大量测试结果与示例案例。 PHOTOS的C++版本相较于其FORTRAN前身，具备更高的物理计算精度，且操控更为便捷…… 程序名称：Photos++ 目录标识：AEYF_v1_0 问题属性 本文所述算法可用于为采用指定事件记录格式的外部软件生成的物理事件添加末态辐射，亦可处理从数据文件加载的事件样本。用户可自定义算法可作用的衰变树分支，还可研究次领头阶修正的影响，以及与正负电子对、μ子对产生及光子发射相关的各类可选配置的效果。 本程序在Mendeley数据平台的CPC（《计算机物理学报》，Computer Physics Communications）知识库中的版本信息为： AEYF_v1_0；Photos++；DOI: 10.1016/j.cpc.2015.09.013 本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2018年）