Color, Spin and Flavor Diffusion in Quark-Gluon Plasmas

Abstract

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, $m_{mag}\sim {\alpha }_{s}T$, 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.

5 pages, no figures

References in corpus (3)

• Damping rates for moving particles in hot QCD
• Color Diffusion and Conductivity in a Quark-Gluon Plasma
• Comment on ``Damping of energetic gluons and quarks in high-temperature QCD''

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