{"paper":{"title":"Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Cuceu, A. de la Macorra, A. de Mattia, A. Font-Ribera, A. Kremin, A. Meisner, A. P\\'erez-Fern\\'andez, Arjun Dey, A. Rocher, B. A. Weaver, C. Hahn, C. Howlett, C. Lamman, C. Magneville, C. Zhao, D. Bianchi, D. Brooks, D. Huterer, D. Kirkby, D. Schlegel, D. Sprayberry, E. Gazta\\~naga, E. Mueller, E. Sanchez, F. J. Castander, F. Prada, F. Rodr\\'iguez-Mart\\'inez, G. Gutierrez, G. Rossi, G. Tarl\\'e, H. Gil-Mar\\'in, H. K. Herrera-Alcantar, H. Seo, H. Zou, I. P\\'erez-R\\`afols, J. Aguilar, J. E. Forero-Romero, J. Guy, J. Moustakas, J. Silber, K. Honscheid, L. Le Guillou, L. Samushia, M. E. Levi, M. Ishak, M. Landriau, M. Manera, M. Schubnell, M. Vargas-Maga\\~na, N. Findlay, N. Palanque-Delabrouille, O. Lahav, P. Doel, P. Zarrouk, R. Gsponer, R. Joyce, R. Kehoe, R. Miquel, R. Zhou, S. Ahlen, S. Brieden, S. Gontcho A Gontcho, S. Nadathur, S. Novell-Masot, S. Ramirez-Solano, T. Claybaugh, T. Kisner, W. J. Percival","submitted_at":"2025-09-09T18:01:02Z","abstract_excerpt":"We assess the impact of the fiducial cosmology choice on cosmological inference from full-shape (FS) fits of the galaxy power spectrum in the DESI 2024 Data Release 1 (DR1). Using a suite of AbacusSummit DR1 mock catalogues based on the Planck 2018 best-fit cosmology, we quantify potential systematic shifts introduced by analysing the data under five secondary cosmologies - featuring variations in matter density, thawing dark energy, higher effective number of neutrino species, reduced clustering amplitude, and the DESI DR1 BAO best-fit $w_0w_a$CDM cosmology - relative to DESI's baseline Planc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.08057","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2509.08057/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}