Systematic Implementation of Implicit Regularization for Multi-Loop Feynman Diagrams

Details Systematic Implementation of Implicit Regularization for Multi-Loop Feynman Diagrams Systematic Implementation of Implicit Regularization for Multi-Loop Feynman Diagrams

2010-08-08

arxiv.org/abs/1008.1377v3

Int.J.Mod.Phys.A26:2591-2635,2011

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1142/S0217751X11053419

Implicit Regularization (IReg) is a candidate to become an invariant framework in momentum space to perform Feynman diagram calculations to arbitrary loop order. In this work we present a systematic implementation of our method that automatically displays the terms to be subtracted by Bogoliubov's recursion formula. Therefore, we achieve a twofold objective: we show that the IReg program respects unitarity, locality and Lorentz invariance and we show that our method is consistent since we are able to display the divergent content of a multi-loop amplitude in a well defined set of basic divergent integrals in one loop momentum only which is the essence of IReg. Moreover, we conjecture that momentum routing invariance in the loops, which has been shown to be connected with gauge symmetry, is a fundamental symmetry of any Feynman diagram in a renormalizable quantum field theory.

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