Manifestly Dual-Conformal Loop Integration

Local, manifestly dual-conformally invariant loop integrands are now known for all finite quantities associated with observables in planar, maximally supersymmetric Yang-Mills theory through three loops. These representations, however, are not infrared-finite term by term and therefore require regul...

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Published in:arXiv.org 2019-04
Main Authors: Bourjaily, Jacob L, Dulat, Falko, Panzer, Erik
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Language:English
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Consumer goods
Integrals
Local loop
Regularization
Supersymmetry
Yang-Mills theory
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Dulat, Falko
Panzer, Erik
description Local, manifestly dual-conformally invariant loop integrands are now known for all finite quantities associated with observables in planar, maximally supersymmetric Yang-Mills theory through three loops. These representations, however, are not infrared-finite term by term and therefore require regularization; and even using a regulator consistent with dual-conformal invariance, ordinary methods of loop integration would naively obscure this symmetry. In this work, we show how any planar loop integral through at least two loops can be systematically regulated and evaluated directly in terms of strictly finite, manifestly dual-conformal Feynman-parameter integrals. We apply these methods to the case of the two-loop ratio and remainder functions for six particles, reproducing the known results in terms of individually regulated local loop integrals, and we comment on some of the novelties that arise for this regularization scheme not previously seen at one loop.
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subjects Consumer goods
Integrals
Local loop
Regularization
Supersymmetry
Yang-Mills theory
title Manifestly Dual-Conformal Loop Integration
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