Infrared Effects and the Soft Photon Theorem in Massive QED

24 Oct 2018 · R Govindarajan T, Kalyanapuram Nikhil ·

Stueckelberg QED with massive photon is known to be renormalizable. But the limit of the mass going to zero is interesting because it brings the resolution to infrared questions through the role of Stueckelberg field at null infinity in addition to providing new asymptotic symmetries. Such symmetries facilitate the soft photon theorems also.