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arXiv · 2308.13594

Unveiling New Phases of the Standard Model Higgs Potential

Florian Goertz·Álvaro Pastor-Gutiérrez
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Abstract

We present evidence for new phases of the Standard Model Higgs potential. We study the Standard Model physical trajectory accounting for the Higgs curvature mass with the mass-dependent functional renormalisation group. New unstable and non-trivially stable phases are found at energies above the Planck scale and below the Abelian Landau pole. While the first aggravates the well-known metastable phase and threatens the viability of the Standard Model extrapolated to arbitrary scales, the latter can provide a well-defined ultraviolet completion. We investigate the phase diagram as a function of the top quark pole mass and study the effect of new physics through a scalar singlet portal coupling. The new non-trivial phase appears below the Planck scale in extensions of the Standard Model seeking stable trajectories. These findings have a significant impact on existing model building.

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Florian Goertz, Álvaro Pastor-Gutiérrez. 2023-08-25. Unveiling New Phases of the Standard Model Higgs Potential. https://arxiv.org/abs/2308.13594

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