Year: 2023
Type: article
Abstract: If the inflaton field is coupled to the hypercharge Chern-Simons density $F\stackrel{\texttildelow{}}{F}$, an explosive production of helical gauge fields when inflation ends can trigger baryogenesis at the electroweak phase transition. Besides, Higgs inflation identifies the inflaton with the Higgs field $\mathcal{H}$, thus relating cosmological observables to properties of electroweak physics. In this paper we merge both approaches; the helical gauge fields are produced at the end of Higgs inflation from the coupling $|\mathcal{H}{|}^{2}F\stackrel{\texttildelow{}}{F}$. In the metric formulation of gravity we found a window in the parameter space for electroweak baryogenesis consistent with all experimental observations. Conversely, for the Palatini formalism the non-Gaussianity bounds strongly constrain the helicity produced at the end of inflation, forbidding an efficient baryogenesis.
Authors: Yann Cado, Mariano Quirós
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: Centres de Recerca de Catalunya, European Commission, Generalitat de Catalunya, Ministerio de Economía y Competitividad, Institut de Física d'Altes Energies, Horizon 2020 Framework Programme, Departament d'Empresa i Coneixement, Generalitat de Catalunya, HORIZON EUROPE Marie Sklodowska-Curie Actions
OpenAlex ID: W4384108699