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

Gracia-Bondía, J.M. (Universidad de Zaragoza) ; Gutiérrez, H. ; Várilly, J.C.

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.

Idioma: Inglés

DOI: 10.1016/j.nuclphysb.2014.07.018

Año: 2014

Publicado en: NUCLEAR PHYSICS B 886 (2014), 824-869
ISSN: 0550-3213

Factor impacto JCR: 3.929 (2014)

Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 7 / 27 = 0.259 (2014) - Q2 - T1

Financiación: info:eu-repo/grantAgreement/ES/MINECO/FPA2012-35453

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Física Teórica (Departamento de Física Teórica)