Gluon confinement, i-particles and BRST soft breaking
Gluon confinement, i-particles and BRST soft breaking
A few issues on gluon confinement are addressed with the help of a renormalizable gauge model obtained by introducing a replica of the Faddeev-Popov action and a soft breaking of the BRST symmetry. Confinement turns out to be encoded in the spectral properties of the corresponding correlation functions. While the …