Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-01-07
Phys.Rev.D76:014502,2007
Physics
High Energy Physics
High Energy Physics - Lattice
A section about boundary conditions has been added. Extended MC calculations. 8 pages, 7 figures
Scientific paper
10.1103/PhysRevD.76.014502
In lattice gauge theory (LGT) equilibrium simulations of QCD are usually performed with periodic boundary conditions (BCs). In contrast to that deconfined regions created in heavy ion collisions are bordered by the confined phase. Here we discuss BCs in LGT, which model a cold exterior of the lattice volume. Subsequently we perform Monte Carlo (MC) simulations of pure SU(3) LGT with a thus inspired simple change of BCs using volumes of a size comparable to those typically encountered in the BNL relativistic heavy ion collider (RHIC) experiment. Corrections to the usual LGT results survive in the finite volume continuum limit and we estimate them as function of the volume size. In magnitude they are found comparable to those of including quarks. As observables we use a pseudocritical temperature, which rises opposite to the effect of quarks, and the width of the transition, which broadens similar to the effect of quarks.
Bazavov Alexei
Berg Bernd A.
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