Condensates, massive gauge fields and confinement in the SU(3) gauge theory (2108.09453v2)

Abstract: SU(3) gauge theory in the nonlinear gauge of the Curci--Ferrari type is studied. In the low-energy region, ghost condensation and subsequent gauge field condensation can happen. The latter condensation makes classical gauge fields massive. If the color electric potential with string is chosen as the classical gauge field, it produces the static potential with the linear potential. We apply this static potential to the three-quark system, and show, different from the $Y$-type potential, infrared divergence remains in the $\Delta$-type potential. The color electric flux is also studied, and show that the current which plays the role of the magnetic current appears.