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Infrared behavior of the gluon propagator: Confining or confined?

1995; American Physical Society; Volume: 52; Issue: 9 Linguagem: Inglês

10.1103/physrevd.52.5220

1538-4500

Kirsten Büttner, M. R. Pennington,

Particle physics theoretical and experimental studies

The possible infrared behavior of the gluon propagator is studied analytically, using the Schwinger-Dyson equations, in both the axial and the Landau gauge. The possibility of a gluon propagator less singular than 1/${\mathit{k}}^{2}$ when ${\mathit{k}}^{2}$\ensuremath{\rightarrow}0 is investigated and found to be inconsistent, despite claims to the contrary, whereas an infrared enhanced one is consistent. The implications for confinement are discussed.