Universidad de Zaragoza Repository

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)

You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.

Exportado de SIDERAL (2019-07-09-11:36:12)


Visitas y descargas

Este artículo se encuentra en las siguientes colecciones:
Articles