TPEcalc：计算双光子交换振幅的程序
TPEcalc: a program for calculation of two-photon exchange amplitudes
摘要：
TPEcalc是一个基于色散方法计算电子-强子弹性散射中双光子交换（TPE）振幅的C++程序。它是一个命令行工具，接受运动学参数（Q^2和Q^3）作为输入并返回TPE振幅。它可以计算质子，中子和π介子目标。如果用户提供所有必要的形状因子参数化，则支持任何自旋1/2+或自旋0-目标。本文介绍了如何使用TPEcalc并概述了基本理论。程序源代码可从http://tpe.bitp.kiev.ua/下载
英文摘要：
TPEcalc is a C++ program for calculation of two-photon exchange (TPE) amplitudes in elastic electron-hadron scattering, based on the dispersion method. It is a command-line tool which accepts kinematical parameters (Q^2 and epsilon) as input and returns TPE amplitudes. It can do calculations for proton, neutron and pion targets. Any spin 1/2+ or spin 0- target is supported, if the user supplies all necessary form factor parameterizations. This paper describes how to use TPEcalc and outlines underlying theory. The program source code can be downloaded from http://tpe.bitp.kiev.ua/
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
