A study of electroweak vacuum metastability with a singlet scalar dark matter

Abstract

We study several aspects of electroweak vacuum metastability when an extra gauge singlet scalar, a viable candidate for a dark matter particle, is added to the standard model of particle physics, which is assumed to be valid up to the Planck scale. Phase diagrams are drawn for different parameter spaces, and based on that, we graphically demonstrate how the confidence level, at which stability of electroweak vacuum is excluded, depends on such new physics parameters.

22 pages, minor corrections, added additional references, to appear in Physical Review D

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• Gravitational waves from Higgs domain walls
• Higgs Vacuum Stability and Modified Chaotic Inflation
• Light scalar explanation for 18 TeV GRB 221009A
• Cosmological stochastic Higgs stabilization
• Thick Branes in Extra Dimensions and Suppressed Dark Couplings
• A 17 MeV pseudoscalar and the LSND, MiniBooNE and ATOMKI anomalies
• Clues on the Majorana scale from scalar resonances at the LHC
• Purely Triplet Seesaw and Leptogenesis within Cosmological Bound, Dark Matter and Vacuum Stability
• Stability of the Standard Model Vacuum with Vector-Like Leptons: A Critical Examination
• U(1)' coupling constant at low energies from heterotic orbifolds
• Stability of the vacuum as constraint on $U$(1) extensions of the standard model
• Indian Contributions to LHC Theory
• The stability analysis of the extended singlet scalar model with two high scale minima
• Light scalars in neutron star mergers
• The Multiple Point Principle and Extended Higgs Sectors