Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-06-23
Phys.Rev. D68 (2003) 094010
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages; minor changes, to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.68.094010
Within kinetic theory, we look for local equilibrium configurations of the quark-gluon plasma by maximizing the local entropy. We use the well-established transport equations in the Vlasov limit, supplemented with the Waldmann-Snider collision terms. Two different classes of local equilibrium solutions are found. The first one corresponds to the configurations that comply with the so-called collisional invariants. The second one is given by the distribution functions that cancel the collision terms, representing the most probable binary interactions with soft gluon exchange in the t-channel. The two sets of solutions agree with each other if we go beyond these dominant processes and take into account subleading quark-antiquark annihilation/creation and gluon number non-conserving processes. The local equilibrium state appears to be colorful, as the color charges are not locally neutralized. Properties of such an equilibrium state are analyzed. In particular, the related hydrodynamic equations of a colorful fluid are derived. Possible neutralization processes are also briefly discussed.
Manuel Cristina
Mrowczynski Stanislaw
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