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Confinement: G(2) group case

Presenter: Guido Cossu — Scuola Normale Superiore & INFN, Pisa

G. Cossu, A. Di Giacomo, M. D'Elia, B. Lucini, C. Pica

The gauge group being centerless, G2 gauge theory is a good laboratory for studying the role of the centre of the group for colour confinement in Yang-Mills gauge theories. We investigate G2 pure gauge theory at finite temperature on the lattice. By studying the finite size scaling of the plaquette, the Polyakov Loop and their susceptibilities, we show that a genuine deconfinement phase transition takes place. The analysis of the pseudocritical exponents give strong evidence of the deconfinement transition being first order. Implications of our findings for scenarios of colour confinement, mainly in the framework of Colour Superconductivity, are discussed.