Bounds on the renormalized couplings in an SU(2)_L \otimes SU(2)_R symmetric Yukawa model

Details Bounds on the renormalized couplings in an SU(2)_L \otimes SU(2)_R symmetric Yukawa model Bounds on the renormalized couplings in an SU(2)_L \otimes SU(2)_R symmetric Yukawa model

1993-03-23

arxiv.org/abs/hep-lat/9303012v1

Phys.Lett.B317:143-150,1993

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages + 2 figures (appended as postscript files)

Scientific paper

10.1016/0370-2693(93)91584-A

The vacuum stability lower bound on the mass of the Higgs boson is numerically investigated in an $SU(2)_L \otimes SU(2)_R$ symmetric Yukawa model, which describes two heavy degenerate fermion doublets in the limit of vanishing gauge couplings. Good agreement with perturbation theory is found, although the couplings are strong. The upper bound on the fermion mass and renormalized Yukawa coupling is also determined in the part of bare parameter space where reflection positivity has been proven.

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