E. A. Zaborowski, P. C. Taylor, Klaus Honscheid, Andrei Cuceu, Arnaud de Mattia, Alex Krolewski, M. Rashkovetskyi, Ashley J. Ross, C. To, J. Aguilar, S. Ahlen, Abhijeet Anand, S. BenZvi, D. Bianchi, D. Brooks, F. J. Castander, T. Claybaugh, Axel de la Macorra, J. Della Costa, P Doel, S Ferraro, Andreu Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, C. P. Gutiérrez, H. K. Herrera-Alcantar, Cullan Howlett, Dragan Huterer, Mohamad Ridzwan Ishak, Robert Joyce, D. Kirkby, Theodore Kisner, A. Kremin, O. Lahav, C. Lamman, M Landriau, L. Le Guillou, Marc Manera, Paul Martini, Aaron Meisner, R. Miquel, John Moustakas, S Nadathur, Gustavo Niz, N. Palanque‐Delabrouille, W.J Percival, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Lado Samushia, E. Sánchez, D. Schlegel, M. Schubnell, Hee‐Jong Seo, J. Silber, D. Sprayberry, G. Tarlé, Benjamin Alan Weaver, Pauline Zarrouk, Rongpu Zhou, Hu Zou
Abstract The sound horizon scale r s is a key source of information for measurements of H 0 from early-time data, and is therefore a common target of new physics proposed to solve the Hubble tension. We present a sub-2% measurement of the Hubble constant that is independent of this scale, using data from the first data release of the Dark Energy Spectroscopic Instrument (DESI DR1). Building on previous work, we remove dependency on the sound horizon size using a heuristic rescaling procedure at the power spectrum level. A key innovation is the inclusion of uncalibrated (agnostic to r s ) post-reconstruction BAO measurements from DESI DR1, as well as using the CMB acoustic scale θ * as a high-redshift anchor. Uncalibrated type-Ia supernovae are often included as an independent source of Ω m information; here we demonstrate the robustness of our results by additionally considering two supernova-independent alternative datasets. We find somewhat higher values of H 0 relative to our previous work: 69.2 +1.3 -1.4 , 70.3 +1.4 -1.2 , and 69.6 +1.3 -1.8 km s -1 Mpc -1 respectively when including measurements from i) Planck /ACT CMB lensing × unWISE galaxies, ii) the DES Year 3 6×2pt analysis, and iii) Planck /ACT CMB lensing + the DES Year 5 supernova analysis. These remarkably consistent constraints achieve better than 2% precision; they are among the most stringent sound horizon-independent measurements from LSS to date, and provide a powerful avenue for probing the origin of the Hubble tension.