THE ENERGY OF THE HIGH-TEMPERATURE QUARK-GLUON PLASMA

For the quark-gluon plasma, we study the energy-momentum tensor corresponding to the high-temperature Braaten-Pisarski effective action. The tensor is defined by considering the interaction of the plasma with a weak gravitational field. It is first calculated to second order in g (the QCD coupling constant). Then, by exploiting local invariance properties, we write down the complete effective action in curved space. From this we infer the energy tensor to all orders in g. For definiteness, we write this in retarded form. Finally, we discuss positivity of T00 to second order in g.