Roger de Belsunce, Alex Krolewski, E. Chaussidon, Simone Ferraro, Gerrit S. Farren, Boryana Hadzhiyska, Amélie Tamone, Sofia Chiarenza, Noah Sailer, C. Ravoux, J. Aguilar, S. P. Ahlen, D. Bianchi, David J. Brooks, T. Claybaugh, Andrei Cuceu, Axel de la Macorra, J. Della Costa, Biprateep Dey, Peter Doel, Andreu Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, Satya Gontcho A Gontcho, G. Gutiérrez, J. Guy, H. K. Herrera-Alcantar, K. Honscheid, M Ishak, R. Joyce, S. Juneau, R. Kehoe, D. Kirkby, Theodore Kisner, Anthony Kremin, O Lahav, Andrew Lambert, C. Lamman, Martin Landriau, L. Le Guillou, M. E. Levi, Marc Manera, Paul Martini, Aaron Meisner, R. Miquel, S Nadathur, Gustavo Niz, N. Palanque‐Delabrouille, Will J. Percival, Francisco Prada, Ignasi Pérez-Ràfols, Ashley J. Ross, Graziano Rossi, E. Sánchez, David J. Schlegel, M. Schubnell, Hee‐Jong Seo, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, Rongpu Zhou, Hu Zou
Abstract We present a measurement of the amplitude of matter fluctuations over the redshift range 0.8 ≤ z ≤ 3.5 from the cross correlation of over 1.2 million spectroscopic quasars selected by the Dark Energy Spectroscopic Instrument (DESI) across 7,200 deg 2 (∼ 170 quasars/deg 2 ) and Planck PR4 (NPIPE) cosmic microwave background (CMB) lensing maps. We perform a tomographic measurement in three bins centered at effective redshifts z =1.44, 2.27 and 2.75, which have ample overlap with the CMB lensing kernel. From a joint fit using the angular clustering of all three redshift bins (auto and cross-spectra), and including an prior from DESI DR1 baryon acoustic oscillations to break the degeneracy, we constrain the amplitude of matter fluctuations in the matter-dominated regime to be and . We provide a growth of structure measurement with the largest spectroscopic quasar sample to date at high redshift, which is ∼ 1.5σ higher than predictions from ΛCDM fits to measurements of the primary CMB from Planck PR4. The cross-correlation between PR4 lensing maps and DESI DR1 quasars is detected with a signal-to-noise ratio of 21.7 and the quasar auto-correlation at 27.2 for the joint analysis of all redshift bins. We combine our measurement with the CMB lensing auto-spectrum from the ground-based Atacama Cosmology Telescope (ACT DR6) and Planck PR4 to perform a sound-horizon-free measurement of the Hubble constant, yielding through its sensitivity to the matter-radiation equality scale.