Unifying Inflation with the Axion, Dark Matter, Baryogenesis, and the Seesaw Mechanism
Financiación H2020 / H2020 Funds
Resumen: A minimal extension of the standard model (SM) with a single new mass scale and providing a complete and consistent picture of particle physics and cosmology up to the Planck scale is presented. We add to the SM three right-handed SM-singlet neutrinos, a new vectorlike color triplet fermion, and a complex SM-singlet scalar s that stabilizes the Higgs potential and whose vacuum expectation value at ~1011 GeV breaks lepton number and a Peccei-Quinn symmetry simultaneously. Primordial inflation is produced by a combination of s (nonminimally coupled to the scalar curvature) and the SM Higgs boson. Baryogenesis proceeds via thermal leptogenesis. At low energies, the model reduces to the SM, augmented by seesaw-generated neutrino masses, plus the axion, which solves the strong CP problem and accounts for the dark matter in the Universe. The model predicts a minimum value of the tensor-to-scalar ratio r?0.004, running of the scalar spectral index a?-7×10-4, the axion mass mA~100 µeV, and cosmic axion background radiation corresponding to an increase of the effective number of relativistic neutrinos of ~0.03. It can be probed decisively by the next generation of cosmic microwave background and axion dark matter experiments.
Idioma: Inglés
DOI: 10.1103/PhysRevLett.118.071802
Año: 2017
Publicado en: Physical Review Letters 118, 7 (2017), 071802 [7 pp]
ISSN: 0031-9007

Factor impacto JCR: 8.839 (2017)
Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 78 = 0.077 (2017) - Q1 - T1
Factor impacto SCIMAGO: 3.622 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/EC/H2020/656794/EU/Dark energy, non-linearites and effective theories/DEFT
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FPA2015-65745-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RYC-2012-10597
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Teórica (Dpto. Física Teórica)

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