Speaker: 
Kasper Larsen
Speaker affiliation: 
ETH Zurich
Date: 
Friday, June 3, 2016 - 13:00
Room: 
Seminar Room
Title: 
Integration-by-parts reductions from unitarity cuts and algebraic geometry
Abstract: 
Integration-by-parts reductions play a central role in perturbative QFT calculations. They allow the set of Feynman integrals contributing to a given observable to be reduced to a small set of basis integrals and moreover facilitate the computation of those basis integrals. In this talk I introduce an efficient new method for generating integration-by-parts reductions. This method simplifies the task by making use of unitarity cuts and turns the problem of finding the needed total derivatives into one of solving certain polynomial (so-called syzygy) equations.