The problem of the improvement term of the energy-momentum tensor in 4 theory is reconsidered. A unique finite improvement coefficient is shown to renormalize. Dimensional regularization is used and the improvement coefficient depends only on the space-time dimension. Up to three-loop order but not beyond, the value suggested by conformal arguments works. But if use is allowed of 't Hooft's methods to sum the divergences, then this value does work.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)