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Cosmology with a master coupling in flipped SU(5)×U(1): The λ6 universe

Research output: Contribution to journalArticle

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

Original languageEnglish
Article number134864
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 10 Oct 2019

King's Authors


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.

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