Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-11-18
PoS LATTICE2008:264,2008
Physics
High Energy Physics
High Energy Physics - Lattice
Talk presented at Lattice 2008 (Vacuum Structure and Confinement), Williamsburg, 2008 July 14-19; 7 pages, 4 figures; uses PoS
Scientific paper
The random percolation model can be viewed as the dual of a well defined confining gauge theory; since this theory, having no Monte Carlo dynamics at all, is simple to simulate, it is possible to study the properties of the flux tube with very high precision; we show it can be described by the effective string picture. Our results are lattice regularisation independent, therefore they are well defined also in the continuum limit, and, for the first time in a gauge theory, it has been possible to determine the next-to-leading quantum corrections throughout the computation of the T^6 coefficient of the Taylor expansion of sigma(T). Furthermore, this coefficient results to be related to the universal ratio T_c/\sqrt{sigma_0}.
Giudice Pietro
Gliozzi Ferdinando
Lottini Stefano
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