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astro-ph.CO2025
Early Universe Constraints on Variations in Fundamental Constants Induced by Ultralight Scalar Dark Matter
Subhajit Ghosh, Kimberly K. Boddy, Tien-Tien Yu
We study the cosmological impact of ultralight dark matter (ULDM) with a quadratic coupling to Standard Model particles. In addition to the suppression of small-scale power from UL…
astro-ph.CO2025★ 7 cited
Directly Probing Neutrino Interactions through CMB Phase Shift Measurements
Gabriele Montefalcone, Subhajit Ghosh, Kimberly K. Boddy +2
Perturbations in the cosmic neutrino background produce a characteristic phase shift in the acoustic oscillations imprinted in the anisotropies of the cosmic microwave background (…