4 papers · 1 filter
Partial Relief of the Hubble Tension and a Natural Self-Interacting Dark Matter Candidate From Staged Symmetry Breaking
Zachary J. Hoelscher, Thomas W. Kephart, Robert J. Scherrer +1
The values of the Hubble constant () inferred from the cosmic microwave background (CMB) and local measurements via the distance ladder exhibit a tension. In thi…
DESI-Like Hubble Expansion From Staged Symmetry Breaking: Constraints on Renormalizable Models
Zachary J. Hoelscher, Thomas W. Kephart, Robert J. Scherrer +1
The Dark Energy Spectroscopic Instrument (DESI) second data release shows a moderate preference for dark energy with a time-varying equation of state parameter, suggesting that the…
Probing the Nature of Dark Matter Self-Interactions Through Observations of Massive Black Hole Mergers
Zachary J. Hoelscher, Kelly Holley-Bockelmann, Akaxia Cruz +1
Though the nature of dark matter remains elusive, two models have come to prominence with testable predictions: cold dark matter (CDM) and self-interacting dark matter (SIDM). Whil…
Cosmological Impacts of Black Hole Mergers: No Relief in Sight for the Hubble Tension
Zachary J. Hoelscher, Thomas W. Kephart, Kelly Holley-Bockelmann
The values of the Hubble constant inferred from local measurements and the cosmic microwave background (CMB) exhibit an approximately 5 sigma tension. Some have suggested this tens…