Vacuum stress-tensor in SSB theories

Details Vacuum stress-tensor in SSB theories Vacuum stress-tensor in SSB theories

2012-02-20

arxiv.org/abs/1202.4235v2

Physics

High Energy Physics

High Energy Physics - Theory

28 pages, RevTeX, no figures. Some comments on the previous publications on the subject modfied, one reference added

Scientific paper

The renormalized energy-momentum tensor of vacuum has been deeply explored many years ago. The main result of these studies was that such a tensor should satisfy the conservation laws which reflects the covariance of the theory in the presence of loop corrections. In view of this general result we address two important questions, namely how to implement the momentum cut-off in a covariant way and whether this general result holds in the theory with Spontaneous Symmetry Breaking. In the last case some new interesting details arise and although the calculations are more involved we show that the final result satisfies the conservation laws.

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