1996/11/26 by M. Beuthe, R. Gonzalez Felipe, G. López Castro +2 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Fermion #Massless particle #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Soft photon #Vertex (graph theory) #Zero (linguistics) #hep-ph
paper · pdf · doi:10.1016/s0550-3213(97)00263-0
published as Nucl.Phys. B498 (1997) 55-67 · 17 pages, 1 figure, LaTeX
arxiv created 1996/11/26 · openalex publication_date 1997/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The absorptive part of the WWγ vertex induced by massive fermion loops is considered for different kinematical configurations. We show that the axial part of this vertex is different from zero not only when massive fermions are involved but also for massless fermion loops, if one of the W bosons is space-like and the other is time-like. We also discuss in what sense Low's soft photon theorem is satisfied.