出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The gauge group being centreless, 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. In this paper, 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 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 are discussed.
