Mass Spectrum and Bounds on the Couplings in Yukawa Models With Mirror-Fermions

Details Mass Spectrum and Bounds on the Couplings in Yukawa Models With Mirror-Fermions Mass Spectrum and Bounds on the Couplings in Yukawa Models With Mirror-Fermions

1992-12-12

arxiv.org/abs/hep-lat/9212015v1

Nucl.Phys.Proc.Suppl.30:647-653,1993

Physics

High Energy Physics

High Energy Physics - Lattice

7 (Latex) pages

Scientific paper

10.1016/0920-5632(93)90294-G

The $\rm SU(2)_L\otimes SU(2)_R$ symmetric Yukawa model with mirror-fermions in the limit where the mirror-fermion is decoupled is studied both analytically and numerically. The bare scalar self-coupling $\lambda$ is fixed at zero and infinity. The phase structure is explored and the relevant phase transition is found to be consistent with a second order one. The fermionic mass spectrum close to that transition is discussed and a first non-perturbative estimate of the influence of fermions on the upper and lower bounds on the renormalized scalar self-coupling is given. Numerical results are confronted with perturbative predictions.

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