3 papers
astro-ph.CO2025
21-cm Constraints on Dark Matter Annihilation after an Early Matter-Dominated Era
Hwan Bae, Adrienne L. Erickcek, M. Sten Delos +1
Although it is commonly assumed that relativistic particles dominate the energy density of the universe quickly after inflation, a variety of well-motivated scenarios predict an ea…
astro-ph.CO2025
Signatures of Very Early Dark Energy in the Matter Power Spectrum
Alexander C. Sobotka, Adrienne L. Erickcek, Tristan L. Smith
Axion-like scalar fields can induce temporary deviations from the standard expansion history of the universe. The scalar field's contribution to the energy density of the universe…
astro-ph.CO2024
Conversations and Deliberations: Non-Standard Cosmological Epochs and Expansion Histories
Brian Batell, Keith R. Dienes, Brooks Thomas +17
This document summarizes the discussions which took place during the PITT-PACC Workshop entitled "Non-Standard Cosmological Epochs and Expansion Histories," held in Pittsburgh, Pen…