Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-01-17
Phys.Rev.D81:105010,2010
Physics
High Energy Physics
High Energy Physics - Theory
29 pages, 25 figures; published version
Scientific paper
10.1103/PhysRevD.81.105010
We present a more detailed picture of the infrared regime of Landau gauge Yang-Mills theory. This is done within a novel framework that allows one to take into account the influence of finite scales within an infrared power counting analysis. We find that there are two qualitatively different infrared fixed points of the full system of Dyson-Schwinger equations. The first extends the known scaling solution, where the ghost dynamics is dominant and gluon propagation is strongly suppressed. It features in addition to the strong divergences of gluonic vertex functions in the previously considered uniform scaling limit, when all external momenta tend to zero, also weaker kinematic divergences, when only some of the external momenta vanish. The second solution represents the recently proposed decoupling scenario where the gluons become massive and the ghosts remain bare. In this case we find that none of the vertex functions is enhanced, so that the infrared dynamics is entirely suppressed. Our analysis also provides a strict argument why the Landau gauge gluon dressing function cannot be infrared divergent.
Alkofer Reinhard
Huber Markus Q.
Schwenzer Kai
No associations
LandOfFree
Infrared singularities in Landau gauge Yang-Mills theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Infrared singularities in Landau gauge Yang-Mills theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared singularities in Landau gauge Yang-Mills theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-690136