Cosmology with a Master Coupling in Flipped SU(5) $\times$ U(1): The $λ_6$ Universe

John Ellis; Marcos A. G. Garcia; Natsumi Nagata; Dimitri V. Nanopoulos; Keith A. Olive

doi:10.1016/j.physletb.2019.134864

paper

Cosmology with a Master Coupling in Flipped SU(5) $\times$ U(1): The $λ_{6}$ Universe

arXiv:1906.08483 · doi:10.1016/j.physletb.2019.134864

Abstract

We propose a complete cosmological scenario based on a flipped SU(5) $\times$ U(1) GUT model that incorporates Starobinsky-like inflation, taking the subsequent cosmological evolution carefully into account. A single master coupling, $λ_{6}$ , 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.

6 pages, 3 figures

Cosmology with a Master Coupling in Flipped SU(5) × U(1): The λ6​ Universe

Abstract

Cosmology with a Master Coupling in Flipped SU(5) $\times$ U(1): The $λ_{6}$ Universe