Improved Epstein-Glaser renormalization in x-space versus differential renormalization
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
Factor impacto SCIMAGO:

Financiación: info:eu-repo/grantAgreement/ES/MINECO/FPA2012-35453
Tipo y forma: Article (Published version)
Área (Departamento): Física Teórica (Departamento de Física Teórica)

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