On anomalous damping in a quark-gluon plasma

We explore the possibilities of an experimental study of the anomalous damping of quark and gluon collective excitations in hot hadronic matter ζqg ∝ g2T ln(1/g) calculated accurately in our recent work. We show that this study involves serious difficulties. Resumming accurately all the relevant graphs we find that the low frequency polarization operator of colourless currents does not depend on ζ. There may exist small effects, however, involving some influence due to ζ which are in principle measurable. One of these effects is some increase of relaxation time which in a relativistic plasma, is not seen, unfortunately, in the leading order. For a low density nonrelativistic plasma, however, the effect may be significant. (orig.)