Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-01-24
Phys.Rev.Lett. 72 (1994) 3013-3016
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, no figures
Scientific paper
10.1103/PhysRevLett.72.3013
In weakly interacting quark-gluon plasmas diffusion of color is found to be much slower than the diffusion of spin and flavor because color is easily exchanged by the gluons in the very singular forward scattering processes. If the infrared divergence is cut off by a magnetic mass, $m_{mag}\sim \alpha_sT$, the color diffusion is $D_{color}\sim (\alpha_s\ln(1/\alpha_s)T)^{-1}$, a factor $\alpha_s$ smaller than spin and flavor diffusion. A similar effect is expected in electroweak plasmas above $M_W$ due to $W^\pm$ exchanges. The color conductivity in quark-gluon plasmas and the electrical conductivity in electroweak plasmas are correspondingly small in relativistic heavy ion collisions and the very early universe.
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