[Show abstract][Hide abstract] ABSTRACT: We measure the correlation length of Polyakov loop in the region of the deconfinement transition for a pure gauge SU(3) theory on lattices of different sizes. The correlation length is found to be of the order of lattice size, thus excluding a strong first order transition.
Full-text · Article · Jun 1989 · Nuclear Physics B - Proceedings Supplements
[Show abstract][Hide abstract] ABSTRACT: By using a source method and improved measuring techniques, we study the decay of the Polyakov loop in SU(3) lattice gauge theory at finite temperature. Our aim is to measure the correlation length of the system in the neighbourhood of the critical point. We work with lattices of size up to 162×64×4. We found that the maximum correlation length is only bounded by the spatial dimension of the lattice. This result is the one expected in a second order phase transition and appears to be incompatible with the presence of the strong first order transition claimed in the literature.
Full-text · Article · May 1989 · Nuclear Physics B
[Show abstract][Hide abstract] ABSTRACT: We study the hadronic mass spectrum in quenched lattice QCD. We present the results of numerical simulations done at β = 5.7 and β = 6.0. B and A1 meson masses get much closer to the physical values at β = 6.0, and so do the baryonic splittings. The mass ratio in the chiral limit tends to be from 10 to 20% higher than the experimental value. We estimate the nucleon σ term from the proton mass slope.
No preview · Article · Nov 1988 · Physics Letters B
[Show abstract][Hide abstract] ABSTRACT: We study the behavior of the string tension in the SU(3) lattice pure-gauge theory close to the deconfining critical point. We find very large correlation lengths, increasing with the lattice size. This result is strongly suggestive of a second-order phase transition, and excludes the presence of a strong first-order transition.
Full-text · Article · Nov 1988 · Physical Review Letters