3 citations · 3 across the 4 of their papers we have counts for
5 papers
Interpretation of Nanohertz Gravitational Waves via Cosmic Strings in Post-BBN Matter and Kination Domination
Raymond T. Co, Siu Cheung Lam, Taegyu Lee
Recent pulsar timing array (PTA) observations have reported evidence for a common low frequency signal consistent with a stochastic gravitational wave background. In this work, we…
New Isocurvature Constraints from JWST UV Luminosity Function
Raymond T. Co, Sai Chaitanya Tadepalli
We constrain uncorrelated primordial isocurvature perturbations using a combination of large- and small-scale cosmological probes, with the small-scale data provided by the ultravi…
Reviving sub-keV warm dark matter: a UVLF-based analysis
Raymond T. Co, Siu Cheung Lam, Sai Chaitanya Tadepalli +1
Thermal warm dark matter (WDM) particles with are ruled out at more than by multiple observational probes, owing to the strong suppression of…
(Non-)Perturbative Dynamics of a Light QCD Axion: Dark Matter and the Strong CP Problem
Raymond T. Co, Taegyu Lee, Owen P. Leonard
Considerable theoretical efforts have gone into expanding the reach of the QCD axion beyond its canonical mass--decay-constant relation. The QCD axion model reduces…
Non-Gaussianity from explicit -breaking interactions
Raymond T. Co, Taegyu Lee, Sai Chaitanya Tadepalli
We investigate primordial non-Gaussianity (NG) arising from the explicit symmetry-breaking interactions during inflation involving a nearly massless axial component of a com…