Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape

Elbers, Willem; Avilés, Alejandro; Noriega, H. E.; Chebat, D.; Menegas, A.; Frenk, Carlos S.; García-Quintero, C.; Gonzalez, D.; Ishak, Mustapha; Lahav, O.; Naidoo, Krishna; Niz, Gustavo; Yèche, C.; Adame, A. G.; Ahlen, S. P.; Alves, O.; Andrade, U.; Avilés, Alejandro; Behera, J.; BenZvi, S.; Bianchi, D.; Brieden, S.; Brodzeller, A.; Brooks, D.; Burtin, E.; Calderón, R.; Canning, R. E. A.; Rosell, A. Carnero; Casas, Lidia; Castander, F. J.; Charles, M.; Chaussidon, E.; Chaves-Montero, J.; Claybaugh, T.; Cole, S.; Cooper, Andrew P.; Cuceu, Andrei; Dawson, Kyle; Macorra, Axel de la; Mattia, Arnaud de; Deiosso, N.; Dey, Arjun; Dey, Biprateep; Ding, Z.; Doel, Peter; Eisenstein, D. J.; Ferraro, Simone; Font-Ribera, Andreu; Forero-Romero, J. E.; Garrison, L. H.; Gaztañaga, E.; Gil-Marín, Héctor; Gontcho, Satya Gontcho A; González‐Morales, Alma X.; Gutiérrez, G.; He, S.; Herbold, M.; Herrera-Alcantar, H. K.; Howlett, Cullan; Huterer, Dragan; Juneau, S.; Kehoe, R.; Kirkby, D.; Kisner, Theodore; Kremin, A.; Lamman, C.; Landriau, Martin; Guillou, L. Le; Leauthaud, Alexie; Levi, M. E.; Li, Qiong; Lodha, K.; Magneville, C.; Manera, Marc; Martini, P.; Matthewson, William L.; Meisner, Aaron; Mena-Fernández, J.; Miquel, R.; Moustakas, John; Nadathur, S.; Newman, Jeffrey A.; Paillas, E.; Palanque‐Delabrouille, N.; Percival, Will J.; Pieri, Matthew M.; Poppett, C.; Prada, F.; Pérez-Ràfols, Ignasi; Rabinowitz, D.; Ramírez-Pérez, C.; Rashkovetskyi, M.; Ravoux, C.; Rivera-Morales, H.; Rohlf, J.; Ross, Ashley J.; Rossi, Graziano; Ruhlmann-Kleider, V.; Samushia, Lado; Sánchez, E.; Schlegel, David J.; Schubnell, M.; Seo, Hee‐Jong; Sinigaglia, Francesco; Sprayberry, D.; Tan, T.; Tarlé, G.; Taylor, Peter L.; Turner, W.; Vargas-Magaña, M.; Verde, Licia; Walther, Michael; Weaver, B. A.; Whitford, Abbé M; Wolfson, Molly; Zarrouk, Pauline; Zhao, Cheng; Zhou, Rongpu; Zou, Hu

doi:10.1103/w9pk-xsk7

articlePhysical review. D/Physical review. D.Aug 4, 2025HYBRID OA

Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape

WEWillem Elbers AAAlejandro Avilés HEH. E. Noriega DCD. Chebat AMA. Menegas

Durham University · Instituto de Estudios Avanzados · +73 more institutions

Indexed inarxivcrossref

Abstract

The Dark Energy Spectroscopic Instrument (DESI) Collaboration has obtained robust measurements of baryon acoustic oscillations in the redshift range 0.1 < z < 4.2 , based on the Lyman- α forest and galaxies from data release 2. We combine these measurements with cosmic microwave background (CMB) data from and the Atacama Cosmology Telescope to place our tightest constraints yet on the sum of neutrino masses. Assuming the cosmological Λ CDM model and three degenerate neutrino states, we find ∑ m ν < 0.0642 eV (95%) with a marginalized error of σ ( ∑ m ν ) = 0.020 eV . We also constrain the effective number of neutrino species, finding N eff = 3.2 3 − 0.34 + 0.35 (95%),…

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Topics

Keywords

Neutrino
Neutrino oscillation
Cosmic microwave background
Cosmology
Dark energy
Measurements of neutrino speed
Cosmic background radiation
Limit (mathematics)

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