Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-11-18
Phys.Rev. D69 (2004) 014506
Physics
High Energy Physics
High Energy Physics - Lattice
15 pages, 14 figures, typos corrected
Scientific paper
10.1103/PhysRevD.69.014506
We study SU(3) gluon electric and magnetic masses at finite temperatures using quenched lattice QCD on a $20^2 \times 32 \times 6$ lattice. We focus on temperature regions between $T=T_c$ and $6T_c$, which are realized in BNL Relativistic Heavy Ion Collider and CERN Large Hadron Collider experiments. Stochastic quantization with a gauge-fixing term is employed to calculate gluon propagators. The temperature dependence of the electric mass is found to be consistent with the hard-thermal-loop perturbation, and the magnetic mass has finite values in the temperature region of interest. Both screening masses have little gauge parameter dependence. The behavior of the gluon propagators is very different in confinement/deconfinement physics. The short distance magnetic part behaves like a confined propagator even in the deconfinement phase. A simulation with a larger lattice, $32^2 \times 48 \times 6 $, shows that the magnetic mass has a stronger finite size effect than the electric mass.
Nakamura Akihiro
Saito Takesi
Sakai Shoko
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