C++中的PHOTOS接口;技术和物理文档
PHOTOS Interface in C++; Technical and Physics Documentation
摘要：
五年来，粒子和共振衰变中韧致辐射的照片蒙特卡罗已经可以通过C++ HepMC事件记录的接口获得。本文的主要目的是记录PHOTOS Monte Carlo安装和当前版本使用的技术方面。大量的测试结果和示例与程序代码一起分发。PHOTOS C++的物理精度优于其前代FORTRAN，并且还提供了更方便的转向选项。实现了过程相关光子发射核所需的事件记录接口的算法。它用于Z和W衰变，用于衰变的完整一阶矩阵元素的核。末态轻子对的附加发射也是可用的。对程序中所用的物理假设和溶液的性质进行了评述。特别是，它是解释如何使用二阶矩阵元素的程序迭代过程的设计和验证。并说明了程序中采用的相空间参数化方法是准确的。
英文摘要：
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 options are also available. An algorithm for the event record interface necessary for process dependent photon emission kernel is implemented. It is used in Z and W decays for kernels of complete first order matrix elements of the decays. Additional emission of final state lepton pairs is also available. Physics assumptions used in the program and properties of the solution are reviewed. In particular, it is explained how the second order matrix elements were used in design and validation of the program iteration procedure. Also, it is explained that the phase space parametrization used in the program is exact.
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