Derivative expansion and gauge independence of the false vacuum decay rate in various gauges
Abstract
In theories with radiative symmetry breaking, the calculation of the false vacuum decay rate requires the inclusion of higherorder terms in the derivative expansion of the effective action. I show here that, in the case of covariant gauges, the presence of infrared singularities forbids the consistent calculation by keeping the lowestorder terms. The situation is remedied, however, in the case of R_{ξ} gauges. Using the Nielsen identities I show that the final result is gauge independent for generic values of the gauge parameter v that are not anomalously small.
 Publication:

Physical Review D
 Pub Date:
 April 2001
 DOI:
 10.1103/PhysRevD.63.085009
 arXiv:
 arXiv:hepph/0011015
 Bibcode:
 2001PhRvD..63h5009M
 Keywords:

 11.15.Bt;
 General properties of perturbation theory;
 High Energy Physics  Phenomenology
 EPrint:
 Some comments and references added