Unitarity of the Standard Model at the Higgs' Resonance
J. Sirkka, I. Vilja
Abstract
We compute a unitarity bound for higgs mass using one--loop corrected s--wave partial amplitude for ZL ZL → ZL ZL scattering. We use the equivalence theorem and show that the higgs mass has to be less than ≈ 600 GeV in order to save the (perturbative) unitarity in the higgs' resonance region. We also discuss about the validity of perturbation expansion in the symmetry breaking sector.
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