Abstract
We propose a complete cosmological scenario based on a flipped SU(5)×U(1) GUT model that incorporates Starobinsky-like inflation, taking the subsequent cosmological evolution carefully into account. A single master coupling, λ6, connects the singlet, GUT Higgs and matter fields, controlling 1) inflaton decays and reheating, 2) the gravitino production rate and therefore the non-thermal abundance of the supersymmetric cold dark matter particle, 3) neutrino masses and 4) the baryon asymmetry of the Universe.
Highlights
We propose a complete cosmological scenario based on a flipped SU(5) × U(1) grand unified theory (GUT) model that incorporates Starobinsky-like inflation, taking the subsequent cosmological evolution carefully into account
In this Letter we develop a complete cosmological scenario based on a detailed flipped SU(5)×U(1) GUT model [1,2] incorporating Starobinsky-like inflation [3], and relate a host of cosmological observables through a single master coupling, denoted by λ6
Ing temperature, 2) the gravitino production rate and the non-thermal abundance of the lightest supersymmetric particle (LSP) that is a candidate for cold dark matter, 3) neutrino masses, and 4) the baryon asymmetry of the Universe through leptogenesis [6]
Summary
We propose a complete cosmological scenario based on a flipped SU(5) × U(1) GUT model that incorporates Starobinsky-like inflation, taking the subsequent cosmological evolution carefully into account. A single master coupling, λ6, connects the singlet, GUT Higgs and matter fields, controlling 1) inflaton decays and reheating, 2) the gravitino production rate and the non-thermal abundance of the supersymmetric cold dark matter particle, 3) neutrino masses and 4) the baryon asymmetry of the Universe.
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