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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-2316
DTSTART:20111110T203000Z
DTEND:20111110T213000Z
DTSTAMP:20260415T004352Z
LAST-MODIFIED:20111102T200528Z
LOCATION:4274 Chamberlin Hall
SUMMARY:The Non-perturbative Gluon Propagator & The Nucleon and Roper 
 Form Factors in a Contact Interaction.\, NPAC (Nuclear/Particle/Astro/
 Cosmo) Forum\, David Wilson\, Argonne National Laboratory
DESCRIPTION:The Non-Perturbative Gluon Propagator is a principal tool 
 in investigating strongly coupled QCD. It may be obtained from Lattice
  QCD or its Schwinger-Dyson equation\, which shall be discussed here. 
 The transition from perturbative behaviour at large momenta to non-per
 turbative behaviour at small momenta is accompanied by characteristic 
 phenomena such as dynamical chiral symmetry breaking and confinement. 
 The gluon is expected to play a key role in this through the behaviour
  of the propagator dressing and its coupling to quarks. Solutions in t
 he Landau gauge working in Euclidean space will be presented and compa
 red to those obtained via other methods.<br>
\n<br>
\nSecondly\, resul
 ts from a recently completed project will also be presented where the 
 Nucleon\, Roper and transition electromagnetic form factors are obtain
 ed in a symmetry preserving treatment of the bound state equations of 
 QCD. Using a simplified interaction\, the form factors are presented a
 s part of a framework capable of simultaneously describing nucleon and
  meson physics. The aim of the present study is to address the structu
 re of the Roper resonance which has been a puzzle for several decades 
 and is a key target of the JLab N* program.
URL:https://www.physics.wisc.edu/events/?id=2316
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