The emission of soft radiation provides a fundamental probe of the consistency of the underlying quantum field theory. Correspondingly, the measurement of the soft photon bremsstrahlung, such as the one proposed with the planned future upgrade of the ALICE experiment at the LHC, is of great interest. In this letter we explore the possibility to implement analytic techniques that have been recently developed for soft gluon resummation at Next-to-Leading-Power (NLP) in the context of the soft photon spectrum. We provide a formula for the differential cross-section with shifted kinematics that is particularly suitable for numerical implementations. We also discuss the impact of loop corrections to Low's theorem due to radiative jet functions.

软辐射的发射提供了对潜在量子场论一致性的基本探索。相应地，软光子轫致辐射的测量，例如计划在 LHC 的 ALICE 实验的未来升级中提出的测量，引起了极大的兴趣。在这封信中，我们探讨了在软光子光谱的背景下实施最近开发的用于在 Next-to-Leading-Power (NLP) 上进行软胶子恢复的分析技术的可能性。我们提供了一个具有位移运动学的微分横截面公式，该公式特别适用于数值实现。我们还讨论了辐射射流函数对 Low 定理的环路修正的影响。