1202.4105 (Marco Frasca)

Condensates in the refined Gribov-Zwanziger scenario    [PDF]

Marco Frasca

Recent lattice computations showed how the approach dubbed "refined
Gribov-Zwanziger scenario" is in very good agreement with data and the gluon
propagator fits them very well. This propagator can be described as a finite
sum of Yukawa propagators and can be obtained introducing some condensates
representing the contribution of the vacuum of Yang-Mills theory. The values of
the condensates are arbitrary and are obtained through lattice data. This kind
of structure of the propagator is in agreement with the one we obtained using a
different analytical approach but with the substantial difference that here all
the physical parameters are properly fixed. We show that our approach can
properly fix all the values of the condensates in the refined Gribov-Zwanziger
scenario giving a complete validation to both techniques. This will provide an
interesting view to the gluon propagator and a set of values to be
experimentally determined.

View original: http://arxiv.org/abs/1202.4105