Infrared structure of non-Abelian gauge theories
- 15 August 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 16 (4), 1065-1078
- https://doi.org/10.1103/physrevd.16.1065
Abstract
The infrared structure of non-Abelian gauge theories is studied explicitly in the lowest nontrivial order in the coupling constant for fermion-fermion and fermion-gauge-boson scattering cross sections. The cancellation of the infrared-divergent terms is realized in physically sensible cross sections when they are expanded in a power series in the bare coupling constant, a situation similar to quantum electrodynamics. However, the renormalization of the coupling constant introduces another infrared singularity, so that the physically sensible cross sections of order are infrared divergent. This situation is completely foreign to the case of quantum electrodynamics.
Keywords
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