Can an Infrared-vanishing Gluon propagator Confine Quarks?

Details Can an Infrared-vanishing Gluon propagator Confine Quarks? Can an Infrared-vanishing Gluon propagator Confine Quarks?

1994-08-19

arxiv.org/abs/hep-ph/9408327v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Summary of a presentation at ``The Workshop on Quantum Infrared Physics'', The American University of Paris, 6-10 June, 1994.

Scientific paper

It is shown that the solution of the quark Dyson-Schwinger equation in QCD
obtained with a gluon propagator of the form $D(q) \sim q^2/[q^4+b^4]$ and a
quark-gluon vertex that is free of kinematic singularities does not describe a
confined particle and that there is always a value of $b^2 = b^2_c$ such that
chiral symmetry is not dynamically broken for $b^2>b_c^2$.

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