Vacuum stress tensor in spontaneous symmetry breaking theories

M Asorey, PM Lavrov, BJ Ribeiro, IL Shapiro�- Physical Review D—Particles�…, 2012 - APS
M Asorey, PM Lavrov, BJ Ribeiro, IL Shapiro
Physical Review D—Particles, Fields, Gravitation, and Cosmology, 2012APS
The renormalized energy-momentum tensor of vacuum was deeply explored many years
ago. The main result of these studies was that such a tensor should satisfy the conservation
laws which reflect 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 cutoff 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�…
The renormalized energy-momentum tensor of vacuum was deeply explored many years ago. The main result of these studies was that such a tensor should satisfy the conservation laws which reflect 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 cutoff 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.
American Physical Society