On the IR behaviour of the Landau-gauge ghost propagator

Details On the IR behaviour of the Landau-gauge ghost propagator On the IR behaviour of the Landau-gauge ghost propagator

2008-03-14

arxiv.org/abs/0803.2161v1

JHEP 0806:099,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, Axodraw needed

Scientific paper

10.1088/1126-6708/2008/06/099

We examine analytically the ghost propagator Dyson-Schwinger Equation (DSE) in the deep IR regime and prove that a finite ghost dressing function at vanishing momentum is an alternative solution (solution II) to the usually assumed divergent one (solution I). We furthermore find that the Slavnov-Taylor identities discriminate between these two classes of solutions and strongly support the solution II. The latter turns out to be also preferred by lattice simulations within numerical uncertainties.

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