Long-distance behavior of qq̄ color dependent potentials at finite temperature
نویسندگان
چکیده
SU(3) heavy quark potentials at finite temperature are studied by quenched lattice QCD with the stochastic gauge-fixing method. In addition to the standard color average channel, we investigate qq̄ potentials in singlet and octet channels. The singlet qq̄ channel yields an attractive force, while the octet qq̄ potential is repulsive; the corresponding color average channel also results in the attractive force. As the temperature increases, these forces are weakened and their variations are very small; at T/Tc = 1.8 ∼ 5.6, the singlet attractive force survives over R ∼ 1/T . The singlet and octet potentials calculated with this algorithm have the small gauge dependence when the gauge parameter α is changed from 0.6 to 1.3.
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