Gauge-invariant energy-momentum tensor for massive QED

Hans G. Embacher, Gebhard Grübl and Rainer Patek

Institut für Theoretische Physik, Universität Innsbruck,
A-6020 Innsbruck, Sillgasse 8, Austria

Received 4 March 1985


Abstract. For massive QED with gauge-fixing term a candidate for the energy-momentum tensor is presented. Both cases of scalar and spinor matter fields are treated. The energy-momentum tensor is invariant under the restricted gauge transformations which exist in that model. This property guarantees that the unphysical scalar photons do not contribute to the energy-momentum densities. The difference between the translational generators and the energy-momentum observables is pointed out.

Phys. Rev. D. 33, 1162 - 1165 (1986).

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