Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke
By G. Ballesteros, J. Redondo, A. Ringwald, C. Tamarit. 2016
209 citations recorded by the source corpus.
We present a minimal extension of the Standard Model (SM) providing a consistent picture of particle physics from the electroweak scale to the Planck scale and of cosmology from inflation until today. Three right-handed neutrinos Ni, a new color triplet Q and a complex SM-singlet scalar σ, whose vacuum expectation value vσ ∼ 1011 GeV breaks lepton number and a Peccei-Quinn symmetry simultaneously, are added to the SM. At low energies, the model reduces to the SM, augmented by seesaw generated neutrino masses and mixing, plus the axion. The latter solves the strong CP problem and accounts for the cold dark matter in the Universe. The inflaton is comprised by a mixture of σ and the SM Higgs, and reheating of the Universe after inflation proceeds via the Higgs portal. Baryogenesis occurs via thermal leptogenesis. Thus, five fundamental problems of particle physics and cosmology are solved at one stroke in this unified Standard Model—axion—seesaw—Higgs portal inflation (SMASH) model. It can be probed decisively by upcoming cosmic microwave background and axion dark matter experiments.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/dd5e988aa6db04adec7b8def9fc105f556b573db
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Citations in the corpus
- Primordial gravitational waves, precisely: the role of thermodynamics in the Standard Model (2018, background): “It would be interesting to investigate the spectrum of primordial GWs in the context of concrete models of inflation and thermal history of the universe based on physics beyond the SM, such as a model based on the spontaneous breaking of the B − L symmetry [113] or that of the Peccei-Quinn symmetry ”
- New experimental approaches in the search for axion-like particles (2018, methodology): “In particular by the decay of some heavy scalar field [295] like the inflaton or by parametric resonance of the inflaton itself [16, 296].”
- Baryogenesis from the weak scale to the grand unification scale (2020, background): “An axion, solving the strong CP problem and providing dark matter, can also be combined with the spontaneous breaking of lepton number, leptogenesis, and Higgs inflation in a nonsupersymmetric extension of the standard model (Ballesteros et al., 2017).”
- Early seeds of axion miniclusters (2018, background): “At least part of the effect comes from the fact that the typical axion momentum is not 0 but of the order of H1, and the energy of partially relativistic axions redshifts faster, as advanced in [86].”