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arxiv: 1203.0237 · v1 · pith:7C3PGFJUnew · submitted 2012-03-01 · ✦ hep-ph · hep-th

Stabilization of the Electroweak Vacuum by a Scalar Threshold Effect

classification ✦ hep-ph hep-th
keywords higgsscalarvacuumelectroweakheavypotentialquarticsinglet
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We show how a heavy scalar singlet with a large vacuum expectation value can evade the potential instability of the Standard Model electroweak vacuum. The quartic interaction between the heavy scalar singlet and the Higgs doublet leads to a positive tree-level threshold correction for the Higgs quartic coupling, which is very effective in stabilizing the potential. We provide examples, such as the see-saw, invisible axion and unitarized Higgs inflation, where the proposed mechanism is automatically implemented in well-defined ranges of Higgs masses.

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