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SUMMARY:Perturbative QFT in D = 4 - Stefan Hollands (Universität Leipzig 
 \; Universität Leipzig )
DTSTART:20181024T080000Z
DTEND:20181024T090000Z
UID:TALK112951@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Non-abelian Yang-Mills theories are the key building blocks of
  the standard model of particle physics. Their renormalization\, even at t
 he perturbative level\, is a difficult problem because it must be shown th
 at -- and in precisely what sense -- there exists a renormalization scheme
  preserving local gauge invariance.In this talk\, I outline solutions to t
 his problem (a) in the context of curved Lorentzian spacetimes and (b) wit
 hin the context of flat Euclidean space. The methods presented are rather 
 different\, in that the first is based on a generalization of the Epstein-
 Glaser method -- also called "causal perturbation theory"\, while the seco
 nd is based on the so called "flow equation method".The talk will be intro
 ductory in nature.
LOCATION:Seminar Room 1\, Newton Institute
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