3 papers
astro-ph.CO2020
Deciphering the Archaeological Record: Cosmological Imprints of Non-Minimal Dark Sectors
Keith R. Dienes, Fei Huang, Jeff Kost +2
Many proposals for physics beyond the Standard Model give rise to a dark sector containing many degrees of freedom. In this work, we explore the cosmological implications of the no…
hep-th2019
Enlarging the Space of Viable Inflation Models: A Slingshot Mechanism
Keith R. Dienes, Jeff Kost, Brooks Thomas
The viability of a given model for inflation is determined not only by the form of the inflaton potential, but also by the initial inflaton field configuration. In many models, fie…
hep-ph2018
Deformation of Axion Potentials: Implications for Spontaneous Baryogenesis, Dark Matter, and Isocurvature Perturbations
Kyu Jung Bae, Jeff Kost, Chang Sub Shin
We show that both the baryon asymmetry of the universe and dark matter (DM) can be accounted for by the dynamics of a single axion-like field. In this scenario, the observed baryon…