Generalized Mandelstam-Leibbrandt regularization
Year: 2025
Type: article
Abstract: Algebraic noncovariant gauges are used often in string theory, Chern-Simons theory, and gravitation and gauge theories. Loop integrals, however, have spurious singularities that need to be regularized. The most popular and consistent regularization is the Mandelstam-Leibbrandt (ML) prescription. This paper extends the ML prescription outside the light cone. It shares all the properties of light cone ML regularization: it preserves naive power counting and gauge invariance. Moreover, using dimensional regularization, we get a closed form for the basic integrals, including divergent and finite pieces. These results simplify calculations in gauge theories and open new avenues for applications in nonlocal models.
DOI: 10.1103/6v6s-3lwj
Author: J. Alfaro
Institution: Pontificia Universidad Católica de Chile
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414814407