Speaker
Description
There has been much progress in performing and understanding EFT matching at the one-loop order in the last decade; however, the methods have rarely been applied to the case of spontaneously broken gauge theories. In this talk, I reexamine the role of gauge symmetries in EFT matching. It is possible to prove the validity of the hard-region matching formula when using the background field (BF) gauge(s), in line with common thinking. In the case of spontaneously broken gauge theories, there are challenges to proceeding with the ordinary BF gauge, to the extent that it prevents a constructive proof. As an alternative, I will introduce a partially fixed BF gauge, which, in addition to being simpler than the ordinary BF gauge, allows for demonstrating the validity of the usual hard-region matching formula.
