Improved Epstein-Glaser renormalization in x-space versus differential renormalization

Fecha

2014-09

Tipo

artículo original

Autores

Gracia Bondía, José M.
Gutiérrez Garro, Heidy
Várilly Boyle, Joseph C.

Título de la revista

ISSN de la revista

Título del volumen

Editor

Resumen

Renormalization of massless Feynman amplitudes in x-space is reexamined here, using almost exclusively real-variable methods. We compute a wealth of concrete examples by means of recursive extension of distributions. This allows us to show perturbative expansions for the four-point and two-point functions at several loop order. To deal with internal vertices, we expound and expand on convolution theory for log-homogeneous distributions. The approach has much in common with differential renormalization as given by Freedman, Johnson and Latorre; but differs in important details.

Descripción

Palabras clave

RENORMALIZATION, MATHEMATICS, PHYSICS

Colecciones