3 citations · 4 across the 4 of their papers we have counts for
4 papers
Cosmology and Astrophysics of CP-Violating Axions
Omar F. Ramadan, Jeremy Sakstein, Djuna Croon
We study the cosmology and astrophysics of axion-like particles (ALPs) with CP-violating Yukawa couplings to nucleons. At finite nucleon density, the ALP's dynamics is governed by…
First Constraints on a Pixelated Universe in Light of DESI
Jonathan J. Heckman, Omar F. Ramadan, Jeremy Sakstein
Pixelated dark energy is a string theory scenario with a quantum mechanically stable cosmological constant. The number of pixels that make up the universe slowly increases, manifes…
DESI Constraints on Exponential Quintessence
Omar F. Ramadan, Jeremy Sakstein, David Rubin
The DESI collaboration have recently analyzed their first year of data, finding a preference for thawing dark energy scenarios when using parameterized equations of state for dark…
An Attractive Proposal for Resolving the Hubble Tension: Dynamical Attractors that Unify Early and Late Dark Energy
Omar F. Ramadan, Tanvi Karwal, Jeremy Sakstein
Early dark energy is a promising potential resolution of the Hubble tension. Unfortunately, many models suffer from the need to fine-tune their initial conditions to ensure that th…