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SUMMARY:Gauge dependence in QCD correlation functions
DTSTART;VALUE=DATE-TIME:20220321T140000Z
DTEND;VALUE=DATE-TIME:20220321T141500Z
DTSTAMP;VALUE=DATE-TIME:20260312T200747Z
UID:indico-contribution-17790@indico.ific.uv.es
DESCRIPTION:Speakers: Pietro Dall'Olio (Universidad de Huelva)\nCorrelatio
 n functions are the building blocks in quantum field theory\, from which a
 ny physical observable can be (in principle) calculated. In a theory with 
 gauge symmetry\, however\, correlation functions are not physical objects\
 , being dependent on the particular gauge fixing prescription. In this wor
 k a novel approach is presented\, which allows to separately calculate\, w
 ithin the class of linear covariant gauges\, the gauge dependent part of a
 n arbitrary correlation function. This framework\, which consists in intro
 ducing a Stueckelberg field and other auxiliary fields in the theory\, all
 ows to generalize the Landau-Khalatnikov-Fradkin transformations\, known i
 n quantum electrodynamics\, to the case of non abelian gauge symmetry. Con
 sistency checks have been carried out by calculating the gauge dependent p
 arts of the gluon propagator at the one loop level and of the quark propag
 ator at the two loops level.\n\nhttps://indico.ific.uv.es/event/6457/contr
 ibutions/17790/
LOCATION:HUELVA
URL:https://indico.ific.uv.es/event/6457/contributions/17790/
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