منابع مشابه
Scale of fermion mass generation
Unitarity of longitudinal weak vector boson scattering implies an upper bound on the scale of electroweak symmetry breaking, Λ EW SB ≡ √ 8πv ≈ 1 TeV. Appelquist and Chanowitz have derived an analogous upper bound on the scale of fermion mass generation , proportional to v 2 /m f , by considering the scattering of same-helicity fermions into pairs of longitudinal weak vector bosons in a theory w...
متن کاملThe scale of fermion mass generation
Appelquist and Chanowitz have derived an upper bound on the scale of fermion mass generation, proportional to v/mf , by considering the scattering of same-helicity fermions into pairs of longitudinal weak vector bosons in a theory without a standard Higgs boson. We show that the derivation of this bound is based on an inconsistent set of assumptions. We argue that there is no upper bound on the...
متن کاملSaturating the Bound on the Scale of Fermion Mass Generation
Recently, Jäger andWillenbrock have shown that the Appelquist and Chanowitz bound on the scale of top-quark mass generation can formally be saturated at tree-level in a particular limit of a two-Higgs doublet model. In this note I present an alternate derivation of their result. I perform a coupled channel analysis for f f̄ → VLVL and VLVL → VLVL scattering and derive the conditions on the param...
متن کاملUnitarity and the scale of fermion mass generation
We study the upper bound on the scale of fermion mass generation in a two-Higgsdoublet model. If the model is weakly-coupled, the scale of fermion mass generation is much less than the Appelquist-Chanowitz unitarity bound. However, if we allow some dimensionless Higgs self-couplings to become large, the Appelquist-Chanowitz unitarity bound can be saturated. The unitarity bound on the scale of t...
متن کاملRg Generated Fermion Mass
Chiral symmetry breaking in a purely fermionic theory is investigated by the help of the renormalization group method. The RG equation for the running mass m k admits a solution with vanishing bare mass and finite physical mass. The running Fermi coupling constant, G k , converges to a finite (renormalized) physical value. It is also shown that the RG equation for˜G, the dimensionless Fermi cou...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2014
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/539/1/012002