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Behaviour of the Absorptive Part of the W Electromagnetic Vertex

M. Beuthe, R. Gonzalez Felipe, G. López Castro, J. Pestieau, D. F. Mexico, México Introduction

Open publisher page 15 citations

Abstract

The absorptive part of the $WW\\gamma$ 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.

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What this paper is about

The absorptive part of the $WW\\gamma$ 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.

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OpenAlex reports 15 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The absorptive part of the $WW\\gamma$ 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.

Key concepts: Massless particle, Vertex (graph theory), Fermion, Soft photon, Boson, Physics, Photon, Mathematical physics

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