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SUMMARY:Field Theory\n
DTSTART;VALUE=DATE-TIME:19991108T090000Z
DTEND;VALUE=DATE-TIME:19991108T130000Z
DTSTAMP;VALUE=DATE-TIME:20130519T191320Z
UID:indico-event-a032361@cern.ch
DESCRIPTION:Lecture 1\nIn these lectures I will build up the concept of fi
 eld theory using the language of Feynman diagrams. As a starting point\, f
 ield theory in zero spacetime dimensions is used as a vehicle to develop a
 ll the necessary techniques: path integral\, Feynman diagrams\, Schwinger-
 Dyson equations\, asymptotic series\, effective action\, renormalization e
 tc. The theory is then extended to more dimensions\, with emphasis on the 
 combinatorial aspects of the diagrams rather than their particular mathema
 tical structure. The concept of unitarity is used to\, finally\, arrive at
  the various Feynman rules in an actual\, four-dimensional theory. The con
 cept of gauge-invariance is developed\, and the structure of a non-abelian
  gauge theory is discussed\, again on the level of Feynman diagrams and Fe
 ynman rules.\n\nhttp://indico.cern.ch/conferenceDisplay.py?confId=a032361
LOCATION:CERN Main Auditorium
URL:http://indico.cern.ch/conferenceDisplay.py?confId=a032361
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