Infrared finite solutions for the gluon propagator and the QCD vacuum energy

Details Infrared finite solutions for the gluon propagator and the QCD vacuum energy Infrared finite solutions for the gluon propagator and the QCD vacuum energy

1997-05-06

arxiv.org/abs/hep-ph/9705241v1

Phys.Lett. B406 (1997) 130-136

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, latex file, 1 postscript figure, uses epsf.sty and axodraw.sty. To be published in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(97)00673-4

Nonperturbative infrared finite solutions for the gluon polarization tensor have been found, and the possibility that gluons may have a dynamically generated mass is supported by recent Monte Carlo simulation on the lattice. These solutions differ among themselves, due to different approximations performed when solving the Schwinger-Dyson equations for the gluon polarization tensor. Only approximations that minimize energy are meaningful, and, according to this, we compute an effective potential for composite operators as a function of these solutions in order to distinguish which one is selected by the vacuum.

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