期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 8, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2017/08/001
关键词
axions; inflation; leptogenesis; particle physics - cosmology connection
资金
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie [656794]
- German Science Foundation (DFG) within the Collaborative Research Center [SFB 676]
- Mainz Institute for Theoretical Physics (MITP)
- Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence
- Ramon y Cajal Fellowship [2012-10597]
- MINECO/FEDER [FPA2015- 65745-P]
- Marie Curie Actions (MSCA) [656794] Funding Source: Marie Curie Actions (MSCA)
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 N-i, a new color triplet Q and a complex SM-singlet scalar sigma, whose vacuum expectation value v sigma similar to 10(11) 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 sigma 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.
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