251 citations · 1.9k across the 44 of their papers we have counts for
6 papers · 1 filter
Higher Spin Dark Matter
Stephon Alexander, Leah Jenks, Evan McDonough
Little is known about dark matter beyond the fact that it does not interact with the standard model or itself, or else does so incredibly weakly. A natural candidate, given the his…
Strongly-Interacting Ultralight Millicharged Particles
Stephon Alexander, Evan McDonough, David N. Spergel
We consider the implications of an ultra-light fermionic dark matter candidate that carries baryon number. This naturally arises if dark matter has a small charge under standard mo…
Nonminimal Couplings and the Forgotten Field of Axion Inflation
Evan McDonough, Alan H. Guth, David I. Kaiser
We study the multifield dynamics of axion models nonminimally coupled to gravity. As usual, we consider a canonical symmetry-breaking model in which the axion is the phase o…
Constraining Early Dark Energy with Large-Scale Structure
Mikhail M. Ivanov, Evan McDonough, J. Colin Hill +4
An axion-like field comprising of the energy density of the universe near matter-radiation equality is a candidate to resolve the Hubble tension; this is the "early dar…
Chiral Symmetry and the Cosmological Constant
Stephon Alexander, Gabriel Herczeg, Jinglong Liu +1
In this work we provide a link between a nearly vanishing cosmological constant and chiral symmetry. This is accomplished with a modification of General Relativity coupled to a top…
The Cosmological Heavy Ion Collider: Fast Thermalization after Cosmic Inflation
Evan McDonough
Heavy-ion colliders have revealed the process of "fast thermalization". This experimental breakthrough has led to new theoretical tools to study the thermalization process at both…