Causality and Loop-Tree Duality at Higher Loops.
Phys Rev Lett
; 122(11): 111603, 2019 Mar 22.
Article
em En
| MEDLINE
| ID: mdl-30951325
ABSTRACT
We relate an l-loop Feynman integral to a sum of phase space integrals, where the integrands are determined by the spanning trees of the original l-loop graph. Causality requires that the propagators of the trees have a modified iδ prescription, and we present a simple formula for the correct iδ prescription.
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Base de dados:
MEDLINE
Tipo de estudo:
Etiology_studies
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article