The road to H 0, m, and w with a global neutrino-telescope network

The newly measured correlation between the neutrino and X-ray luminosities of Seyfert galaxies has yielded the first neutrino-based measurement of the Hubble constant. Building on this result, we forecast the reach of a global neutrino-telescope network by 2030, utilizing full-sky IceCube exposures combined with KM3NeT-ARCA and Baikal-GVD. We find that this 2030 configuration sharpens the neutrino-measured Hubble constant from today's H 0 = 66+44-37 to H 0 =66+15-13 km s-1 Mpc-1. Additionally, we project that the disk-corona slope of the neutrino X-ray luminosity relation (L ν proportional to L X β) will reach β=0.72 plus or minus0.04, enabling a at least !5σ exclusion of the calorimetric value β=1. Finally, we show that, if a high-redshift population of neutrino sources, such as JWST's "little red dots," is identified and obeys the same luminosity relation, we can obtain a new independent measurement of the matter density Ω m and the dark energy equation-of-state parameter w.