Speaker
Dr
Anders Eller Thomsen
(University of Bern)
Description
Functional methods are a popular choice for various RG and EFT matching calculations, although many of the techniques have so far been limited to one-loop calculations. With the increasing demand for precision calculations, we have developed new, practical methods for the multi-loop level. In this talk, I will discuss these new techniques, contrast and compare them with ordinary diagrammatic methods, and make the case that they provide for an efficient framework for RG and matching calculations. If time permits I will also sketch out a recent proof for the validity of the hard-region EFT matching formula at multi-loop order, which is fundamental to off-shell matching calculations both with functional and diagrammatic methods.
