1207.5118 (D. Dudal et al.)

Nontrivial ghost-gluon vertex and the match of RGZ, DSE and lattice
Yang-Mills propagators    [PDF]

D. Dudal, O. Oliveira, J. Rodríguez-Quintero

Either by solving the ghost propagator DSE or through a one-loop computation in the RGZ (Refined Gribov-Zwanziger) formalism, we show that a non-trivial ghost-gluon vertex is anyhow required to obtain a ghost propagator prediction compatible with the available corresponding lattice data in the SU(3) case. For the necessary gluon propagator input, we present RGZ tree level fits which account well for the gluon lattice data. Interestingly, this propagator can be rewritten in terms of a running gluon mass. A comparison of both DSE and RGZ results for the ghost propagator is furthermore provided. We also briefly discuss the connection between the RGZ and the OPE $d=2$ gluon condensate.

View original: http://arxiv.org/abs/1207.5118