论文标题
来自真实光子发射的弹性Lepton-和Antilepton-Proton散射的电荷 - 对称相关性
Charge-asymmetric correlations in elastic lepton- and antilepton-proton scattering from real photon emission
论文作者
论文摘要
通过比较电子和正电子，或Muon和Anti-Muon观察电荷不对称性，目前散射在HADRONIC靶标上是研究两光子交换效应的实验工具。除了两光子交换外，实际光子发射还有助于电荷不对称。我们提供了理论形式主义，明确的表达以及对Lepton和Antilepton-Proton散射中电荷不对称的硬光子发射的数值分析。考虑到不同的运动条件，即固定转移的动量平方或固定的Lepton散射角。 Bardin-Shumeiko技术对实际光子发射的红外发散进行处理，并以使用TSAI方法提取和计算的两光子交换贡献的软部分被取消。相对于Lepton质量，超出超级主义的近似值，获得了所有最终表达式，该质量允许数值评估所考虑的效果，不仅对超层压效应（JLAB）（JLAB），而且对中等相对论（MUSES）运动学也可以评估。
Observation of charge asymmetry by comparing electron and positron, or muon and anti-muon, scattering on a hadronic target presently serves as an experimental tool to study two-photon exchange effects. In addition to two-photon exchange, real photon emission also contributes to the charge asymmetry. We present a theoretical formalism, explicit expressions, and a numerical analysis of hard photon emission for the charge asymmetry in lepton- and antilepton-proton scattering. Different kinematic conditions are considered, namely, either fixed transferred momentum squared or a fixed lepton scattering angle. The infrared divergence from real photon emission is treated by the Bardin-Shumeiko technique and canceled with the soft part of the two-photon exchange contribution extracted and calculated using Tsai approach. All final expressions are obtained beyond the ultrarelativistic approximation with respect to the lepton mass that allows to evaluate numerically of the considered effects not only for ultrarelativistic leptons (JLab) and but for moderately relativistic (MUSE) kinematics, too.
