ENERGY-MOMENTUM TENSORS FOR THE QUARK-GLUON PLASMA

We construct the energy-momentum tensor for the gauge fields which des cribe the collective excitations of the quark-gluon plasma. We rely on the description of the collective modes that we have derived in previ ous works. By using the conservation laws for energy and momentum, we obtain three different versions for the tensor T(munu), which are phys ically equivalent. We show that the total energy constructed from T00 is positive for any non-trivial field configuration. Finally, we prese nt a new non-abelian solution of the equations of motion for the gauge fields. This solution corresponds to spatially uniform color oscillat ions of the plasma.