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- W2091307477 abstract "We study a model Dyson-Schwinger equation for the quark propagator closed using an {it Ansatz} for the gluon propagator of the form mbox{$D(q) sim q^2/[(q^2)^2 + b^4]$} and two {it Ans{a}tze} for the quark-gluon vertex: the minimal Ball-Chiu and the modified form suggested by Curtis and Pennington. Using the quark condensate as an order parameter, we find that there is a critical value of $b=b_c$ such that the model does not support dynamical chiral symmetry breaking for $b>b_c$. We discuss and apply a confinement test which suggests that, for all values of $b$, the quark propagator in the model {bf is not} confining. Together these results suggest that this Ansatz for the gluon propagator is inadequate as a model since it does not yield the expected behaviour of QCD." @default.
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- W2091307477 date "1994-05-01" @default.
- W2091307477 modified "2023-10-18" @default.
- W2091307477 title "Dynamical chiral symmetry breaking and confinement with an infrared-vanishing gluon propagator?" @default.
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- W2091307477 doi "https://doi.org/10.1103/physrevd.49.4683" @default.
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