Algebraic Combinatorics Seminar - Oliver Schnetz

Title: Combinatorial masters in QED

Abstract:

Calculations in perturbative QED (and also in QCD) use a reduction from Feynman integrals to `master integrals'. In general, the reduction to master integrals is performed by excessive use of computer power. Some of the reduction identities, however, are very combinatorial (others not) in the sense that they have a simple graph theoretical description.
I will (ab-)use the seminar to ask the following question: Is it possible to understand the (partial) reduction by these `combinatorial' identities in a mathematically more satisfactory way? Note that this will not be an expert talk on QED. Nor will this talk present any deep results. It should rather be considered as a problem session.