2007•arXiv (Cornell University)Open access

Infrared Divergences from Soft and Collinear Gauge Bosons

P. W. Jameson

Abstract

I review the Lee-Nauenberg thereom and discuss its inclusion of photons which are disconnected at the level of the S-matrix but connected at the level of the cross-section when there are initial and final state charged particles. I then expose a new set of soft collinear divergences in massless gauge theories which are omitted in the standard Lee-Nauenberg approach. It seems that highly questionable assumptions are needed to obtain finite cross-sections.

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Key concepts: Massless particle, Physics, Soft photon, Photon, Gauge boson, Gauge (firearms), Boson, Gauge theory