Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-12-06
Phys.Lett.B506:331-336,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages LaTeX, 3 ps figures included
Scientific paper
10.1016/S0370-2693(01)00156-3
If the Higgs boson weighs about 115 GeV, the effective potential of the Standard Model becomes unstable above a scale of about 10^6 GeV. This instability may be rectified only by new bosonic particles such as stop squarks. However, avoiding the instability requires fine-tuning of the model couplings, in particular if the theory is not to become non-perturbative before the Planck scale. Such fine-tuning is automatic in a supersymmetric model, but is lost if there are no Higgsinos. A light Higgs boson would be prima facie evidence for supersymmetry in the top-quark and Higgs sectors.
Ellis John
Ross Douglas
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