Preprint Article Version 1 This version is not peer-reviewed

Dynamically Generated Inflationary Lambda-CDM

Version 1 : Received: 13 February 2020 / Approved: 16 February 2020 / Online: 16 February 2020 (04:08:26 CET)

A peer-reviewed article of this Preprint also exists.

Benisty, D.; Guendelman, E.I.; Nissimov, E.; Pacheva, S. Dynamically Generated Inflationary ΛCDM. Symmetry 2020, 12, 481. Benisty, D.; Guendelman, E.I.; Nissimov, E.; Pacheva, S. Dynamically Generated Inflationary ΛCDM. Symmetry 2020, 12, 481.

Journal reference: Symmetry 2020, 12, 481
DOI: 10.3390/sym12030481

Abstract

Our primary objective is to construct a plausible unified model of inflation, dark energy and dark matter from a fundamental Lagrangian action first principle, where all fundamental ingredients are systematically dynamically generated starting from a very simple model of modified gravity interacting with a single scalar field employing the formalism of non-Riemannian spacetime volume-elements. The non-Riemannian volume element in the initial scalar field action leads to a hidden nonlinear Noether symmetry which produces energy-momentum tensor identified as a sum of a dynamically generated cosmological constant and a dust-like dark matter. The non-Riemannian volume-element in the initial Einstein-Hilbert action upon passage to the physical Einstein-frame creates dynamically a second scalar field with a non-trivial inflationary potential and with an additional interaction with the dynamically generated dark matter. The resulting Einstein-frame action describes a fully dynamically generated inflationary model coupled to dark matter. Numerical results for observables such as the scalar power spectral index and the tensor-to-scalar ratio conform to the latest 2018 PLANCK data.

Subject Areas

inflation; dark energy; dark matter

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