Bounds on the Renormalized Couplings in a Z2 Scalar-Fermion Model
Abstract
The triviality upper bound and the vacuum stability lower bound on the mass of the scalar particle is numerically investigated in a Z2 scalar-fermion model using staggered fermions. The coupling between the fermion and scalar fields is realized with the overlapping hypercubic type Yukawa interaction. Reasonable agreement between Monte Carlo data and one-loop perturbative results is obtained except that at strong Yukawa couplings, significant deviations arise due to finite cutoff effects. We also find the nondecoupling of heavy fermions as predicted from one-loop calculation.
- Publication:
-
Nuclear Physics B Proceedings Supplements
- Pub Date:
- March 1996
- DOI:
- 10.1016/0920-5632(96)00158-2
- Bibcode:
- 1996NuPhS..47..717L