3 papers
hep-ex2026
TeV-scale neutrino cross-section measurement using upward through-going muons in Super-Kamiokande
N. Bhuiyan, K. Abe, Y. Asaoka +248
Neutrinos provide a unique probe of both particle physics and the high-energy universe, traversing astronomical distances with minimal interaction. Their charged-current scattering…
astro-ph.CO2026
A 2% determination of from primordial element abundance, cosmic microwave background, and baryon acoustic oscillation measurements
Samuel Goldstein, J. Colin Hill
We present a new constraint on the effective number of relativistic species in the early universe, , by combining recent primordial helium abundance measurements from…
astro-ph.CO2025
SPECTER: An Instrument Concept for CMB Spectral Distortion Measurements with Enhanced Sensitivity
Alina Sabyr, Carlos Sierra, J. Colin Hill +1
Deviations of the cosmic microwave background (CMB) energy spectrum from a perfect blackbody uniquely probe a wide range of physics, ranging from fundamental physics in the primord…