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Proceedings of The many faces of QCD — PoS(FacesQCD)
The so-called decoupling and scaling solutions of functional equations of Landau gauge Yang-Mills theory are briefly reviewed. In both types of solutions the positivity violation seen in the gluon propagator is taken as an indication of gluon confinement. In the scaling solution the resulting infrared singularities of the quark-gluon vertex are responsible for the linear potential between static quarks and are therefore signaling quark confinement. A corresponding description of the U A (1)doi:10.22323/1.117.0030 fatcat:avqr5gealfdbrgj64ijjayx54q