Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-03-02
Phys.Rev. D70 (2004) 094019
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, revised, to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.70.094019
Parton-parton collisions do not neutralize local color charges in the quark-gluon plasma as they only redistribute the charges among momentum modes. We discuss color diffusion and color conductivity as the processes responsible for the neutralization of the plasma. For this purpose, we first compute the conductivity and diffusion coefficients in the plasma that is significantly colorful. Then, the time evolution of the color density due to the conductivity and diffusion is studied. The conductivity is shown to be much more efficient than the diffusion in neutralizing the plasma at the scale longer than the screening length. Estimates of the characteristic time scales, which are based on close to global equilibrium computations, suggest that first the plasma becomes white and then the momentum degrees of freedom thermalize.
Manuel Cristina
Mrowczynski Stanislaw
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