标题： 双光子交换在单举介子电产反应中的研究 显示英文标题

标题： Two Photon Exchange for Exclusive Pion Electroproduction

摘要： 我们对π介子电产生截面的两光子交换QED修正进行了详细计算。 结果是在不使用软光子近似和使用软光子近似的情况下得到的；推导出了辐射修正的解析表达式。 分析了几个在杰弗逊实验室进行的实验的运动学条件下两光子修正的相对重要性。 预测在大转移动量下电子散射的后向角度处，由于两光子交换会产生超过20%的显著效应。 显示英文摘要

摘要： We perform detailed calculations of two-photon-exchange QED corrections to the cross section of pion electroproduction. The results are obtained with and without the soft-photon approximation; analytic expressions for the radiative corrections are derived. The relative importance of the two-photon correction is analyzed for the kinematics of several experiments at Jefferson Lab. A significant, over 20%, effect due to two-photon exchange is predicted for the backward angles of electron scattering at large transferred momenta.