手征微扰论中弹性轻子-质子双光子交换的解析计算
高能物理 - 唯象学
2023-11-30 v2
摘要
我们利用重重子手征微扰论,给出低能下弹性轻子-质子散射过程双光子交换贡献的精确计算。计算包含次领头阶精度。该精确解析计算包含所有软与硬双光子交换,并指出了软光子近似方法中缺失的贡献。我们使用维数正规化解析计算了红外发散的四点箱图。我们还强调了由于轻子质量差异,与 MUSE 运动学相关的缪子-质子与电子-质子散射之间的差别。
引用
@article{arxiv.2306.09454,
title = {Analytical Evaluation of Elastic Lepton-Proton Two-Photon Exchange in Chiral Perturbation Theory},
author = {Poonam Choudhary and Udit Raha and Fred Myhrer and Dipankar Chakrabarti},
journal= {arXiv preprint arXiv:2306.09454},
year = {2023}
}
备注
5 figures. Accepted for publication in Eur. Phys. J. A , A short version was presented at the workshop in Trento July 2022