pith. sign in

arxiv: 1302.4290 · v1 · pith:TOK7UQRGnew · submitted 2013-02-18 · ✦ hep-th

Perturbation theory in (2,2) signature

classification ✦ hep-th
keywords signaturecontinuationdiagramsintegralsloopmomentatermsanalytic
0
0 comments X
read the original abstract

We identify a natural analytic continuation in four dimensions from Minkowski signature to a signature with two time-like momentum components. For two, three and four-point diagrams at fixed external momenta, this continuation can be implemented as a countour deformation that leaves dependence on the momenta unchanged. For arbitrary ultraviolet-finite scalar diagrams it is possible to do two integrals per loop in terms of simple poles in the new signature. This results in a representation of any such diagram as a sum of terms, each with two remaining integrals per loop.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.