Can decaying particles raise the upperbound on the Peccei-Quinn scale?

1995/10/31 by Masahiro Kawasaki, M. Kawasaki, Takeo Moroi +2 · 6 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1016/0370-2693(96)00743-5

published as Phys.Lett. B383 (1996) 313-316 · 8 pages, no figures

arxiv created 1995/11/01 · openalex publication_date 1996/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have reexamine the effect of entropy production on the cosmic axion density and find that the Peccei-Quinn scale F_a larger than about 10¹⁵~GeV is not allowed even if large entropy is produced by the decays of coherent oscillations or non-relativistic massive particles. We stress that this result is independent of the details of models for the decaying particles.

Citations

• A simple solution to the strong CP problem with a harmless axion
• Cosmological implications of dynamical supersymmetry breaking

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