Diminished Upper Bounds on the Unification Mass Scales for Heavy Higgs Boson Masses
Abstract
We consider dominant 3-, 4-, and 5-loop contributions to λ, the quartic scalar coupling-constant's β-function in the Standard Model. We find that these terms accelerate the evolution of λ to nonperturbative values, thereby lowering the unification bound for which scalar-couplings are still perturbative. We also find that these higher order contributions imply a substantial lowering of λ itself before the anticipated onset of nonperturbative physics in the Higgs sector.
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