30 citations · 98 across the 8 of their papers we have counts for
4 papers · 1 filter
Massless Preheating and Electroweak Vacuum Metastability
Jeff Kost, Chang Sub Shin, Takahiro Terada
Current measurements of Standard Model parameters suggest that the electroweak vacuum is metastable. This metastability has important cosmological implications, because large fluct…
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…
Kaluza-Klein Towers in the Early Universe: Phase Transitions, Relic Abundances, and Applications to Axion Cosmology
Keith R. Dienes, Jeff Kost, Brooks Thomas
We study the early-universe cosmology of a Kaluza-Klein (KK) tower of scalar fields in the presence of a mass-generating phase transition, focusing on the time-development of the t…
A Tale of Two Timescales: Mixing, Mass Generation, and Phase Transitions in the Early Universe
Keith R. Dienes, Jeff Kost, Brooks Thomas
Light scalar fields such as axions and string moduli can play an important role in early-universe cosmology. However, many factors can significantly impact their late-time cosmolog…