Loop Integrals in Three Outstanding Gauges: Feynman, Light-Cone, and Coulomb
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Data
2001-03-20
Autores
Suzuki, Alfredo T. [UNESP]
Schmidt, Alexandre G. M. [UNESP]
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Resumo
We apply the negative dimensional integration method (NDIM) to three outstanding gauges: Feynman, light-cone, and Coulomb gauges. Our aim is to show that NDIM is a very suitable technique to deal with loop integrals, regardless of which gauge choice that originated them. In the Feynman gauge we perform scalar two-loop four-point massless integrals; in the light-cone gauge we calculate scalar two-loop integrals contributing to two-point functions without any kind of prescriptions, since NDIM can abandon such devices - this calculation is the first test of our prescriptionless method beyond one-loop order; and finally, for the Coulomb gauge we consider a four-propagator massless loop integral, in the split-dimensional regularization context. © 2001 Academic Press.
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Dimensional regularization, Light-cone and Coulomb, Negative dimensional integration, Noncovariant gauges, Quantum field theory
Como citar
Journal of Computational Physics, v. 168, n. 1, p. 207-218, 2001.