The gap equations of background field invariant Refined Gribov-Zwanziger action proposals and the deconfinement transition
arXiv:2302.03230 · doi:10.1103/PhysRevD.107.074020
Abstract
In earlier work, we set up an effective potential approach at zero temperature for the Gribov-Zwanziger model that takes into account not only the restriction to the first Gribov region as a way to deal with the gauge fixing ambiguity, but also the effect of dynamical dimension-two vacuum condensates. Here, we investigate the model at finite temperature in presence of a background gauge field that allows access to the Polyakov loop expectation value and the Yang-Mills (de)confinement phase structure. This necessitates paying attention to BRST and background gauge invariance of the whole construct. We employ two such methods as proposed elsewhere in literature: one based on using an appropriate dressed, BRST invariant, gluon field by the authors and one based on a Wilson-loop dressed Gribov-Zwanziger auxiliary field sector by Kroff and Reinosa. The latter approach outperforms the former, in estimating the critical temperature for N=2, 3 as well as correctly predicting the order of the transition for both cases.
arXiv comment21 figures. arXiv admin note: text overlap with arXiv:2206.06002
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