Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana, Kin-ya Oda, Kei Yagyu. Minimal scenario of Criticality for Electroweak scale, Neutrino Masses, Dark Matter, and Inflation. https://arxiv.org/abs/2102.04617

Hamada, Yuta

Kawai, Hikaru

Kawana, Kiyoharu

Oda, Kinya

Yagyu, Kei

English

Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana, Kin-ya Oda, Kei Yagyu. Minimal scenario of Criticality for Electroweak scale, Neutrino Masses, Dark Matter, and Inflation. https://arxiv.org/abs/2102.04617.We propose a minimal model that can explain the electroweak scale, neutrino masses, Dark Matter (DM), and successful inflation all at once based on the multicritical-point principle (MPP). The model has two singlet scalar fields that realize an analogue of the Coleman-Weinberg mechanism, in addition to the Standard Model with heavy Majorana right-handed neutrinos. By assuming a Z₂ symmetry, one of the scalars becomes a DM candidate whose property is almost the same as the minimal Higgs-portal scalar DM. In this model, the MPP can naturally realize a saddle point in the Higgs potential at high energy scales. By the renormalization-group analysis, we study the critical Higgs inflation with non-minimal coupling ξ|H|²R that utilizes the saddle point of the Higgs potential. We find that it is possible to realize successful inflation even for ξ=25 and that the heaviest right-handed neutrino is predicted to have a mass around 10¹⁴ GeV to meet the current cosmological observations. Such a small value of ξ can be realized by the Higgs-portal coupling λSH≃0.32 and the vacuum expectation value of the additional neutral scalar ⟨ϕ⟩≃2.7 TeV, which correspond to the dark matter mass 2.0 TeV, its spin-independent cross section 1.8×10⁻⁹ pb, and the mass of additional neutral scalar 190 GeV

Osaka University Knowledge Archive

Minimal scenario of Criticality for Electroweak scale, Neutrino Masses, Dark Matter, and Inflation

https://ir.library.osaka-u.ac.jp/repo/ouka/all/78789/2102.04617.pdf

Minimal scenario of Criticality for Electroweak scale, Neutrino Masses, Dark Matter, and Inflation

Abstract

Similar works

Full text

Available Versions

Osaka University Knowledge Archive