Deconfinement transition within the Curci-Ferrari model -- Renormalization scale and scheme dependences

We analyze the confinement/deconfinement transition of pure Yang-Mills theories within the framework of the center-symmetric Landau gauge supplemented by a Curci-Ferrari mass term that models the effect of the associated Gribov copies in the infrared. In addition to providing details for earlier one-loop calculations in that framework, we explore how the results depend on the renormalization scale and/or on the renormalization scheme. We find that the predicted values for the transition temperatures of SU (2) and SU (3) Yang-Mills theories are similar in both schemes and are little sensitive to the renormalization scale over a wide range of values including the standard range T, 4 T. These values are also close both to those obtained from a minimal sensitivity principle and to those of lattice simulations, especially in the SU (3) case. These results further confirm the good behavior of perturbative calculations within the Curci-Ferrari model and support the adequacy of the latter as an effective description of Yang-Mills theories in the infrared. We perform a similar analysis for the spinodal temperatures in the SU (3) case and for the Polyakov loop, the order parameter associated to the breaking of center symmetry.