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SUMMARY:Auxiliary field approach to extended operators for quasi-PDFs
DTSTART;VALUE=DATE-TIME:20170620T130000Z
DTEND;VALUE=DATE-TIME:20170620T132000Z
DTSTAMP;VALUE=DATE-TIME:20200226T114728Z
UID:indico-contribution-332@cern.ch
DESCRIPTION:Speakers: Dr. GREEN\, Jeremy (DESY Zeuthen)\nThe auxiliary fie
ld approach\, where one introduces a field whose propagator is the gauge c
onnection along a chosen path\, has been used to study renormalization of
extended operators in the continuum. If we restrict the paths to straight
lines along the axes\, the theory can be discretized with an action simila
r to lattice heavy-quark effective theory in the static limit. Using this
theory\, extended operators with quark and antiquark fields connected by a
straight Wilson line can be expressed as the product of two displaced loc
al operators\, each of which is the product of a quark field and the auxil
iary field. This allows us to study renormalization and improvement of ext
ended operators using standard techniques applied to local operators invol
ving the auxiliary field.\n\nhttps://makondo.ugr.es/event/0/session/95/con
tribution/332
LOCATION: AndalucĂa III
URL:https://makondo.ugr.es/event/0/session/95/contribution/332
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