2019/03/31 by Fuminobu Takahashi, Wen Yin
Physics and Astronomy · #Big Bang (financial markets) #Constant (computer programming) #Cosmic microwave background #Cosmological constant #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Inflation (cosmology) #Particle (ecology) #Particle physics theoretical and experimental studies #Scale (ratio) #Standard Model (mathematical formulation) #Ultimate fate of the universe #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1007/jhep07(2019)095
29pages, 7figures, v3: version published in JHEP
openalex publication_date 2019/07/01 · arxiv created 2019/07/24 · openalex created_date 2019/07/30 · arxiv updated 2019/09/04 · openalex updated_date 2026/08/06
A bstract We study a hilltop inflation model where an axion-like particle (ALP) plays the role of the inflaton. We find that, for a broad class of potentials, the decay constant and the mass at the potential minimum satisfy the relation, m ϕ ∼ 10 − 6 f , to explain the CMB normalization. The ALP is necessarily coupled to the standard model particles for successful reheating. The ALP with the above relation can be searched at beam dump experiments, e.g., the SHiP experiment, if the inflation scale is sufficiently low. In this case, the ALP decays through the interactions that led to the reheating of the Universe. In other words, the Big Bang may be probed at ground-based experiments.