{"paper":{"title":"DESI DR2 Baryon Acoustic Oscillations from the Lyman Alpha Forest Multipoles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Brodzeller, A. Cuceu, A. de la Macorra, A. Font-Ribera, A. Kremin, A. Meisner, A. Mu\\~noz-Guti\\'errez, A. X. Gonzalez-Morales, B. A. Weaver, Biprateep Dey, C. Hahn, C. Howlett, D. Bianchi, D. Brooks, D. Kirkby, D. Schlegel, D. Sprayberry, E. Gazta\\~naga, E. Sanchez, F. Prada, G. Gutierrez, G. Rossi, G. Tarl\\'e, H. K. Herrera-Alcantar, H. Seo, H. Zou, I. P\\'erez-R\\`afols, J. Aguilar, J. E. Forero-Romero, J. Estrada, J.M. Le Goff, J. Moustakas, J. Silber, K. Honscheid, L. Le Guillou, M. E. Levi, M. Ishak, M. Landriau, M. Manera, M. Schubnell, N. G. Kara\\c{c}ayl{\\i}, N. Palanque-Delabrouille, O. Lahav, P. Doel, P. Martini, R. Joyce, R. Kehoe, R. Miquel, R. Zhou, S. Ahlen, S. Bailey, S. BenZvi, S. Ferraro, S. Gontcho A Gontcho, S. Nadathur, T. Claybaugh, T. Kisner, W. J. Percival","submitted_at":"2026-03-04T17:00:31Z","abstract_excerpt":"We present an alternative measurement of the Baryon Acoustic Oscillation (BAO) using the Legendre multipole representation of the Ly$\\alpha$ forest correlation functions from the second data release (DR2) of the Dark Energy Spectroscopic Instrument survey. Compressing the auto- and cross-correlation functions into Legendre multipoles yields a positive-definite covariance matrix without any smoothing -- unlike the baseline DR2 analysis -- thanks to a significantly reduced data vector size. We introduce the statistical corrections required to debias the finite-sample covariance matrix estimate a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.04281","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/2603.04281/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"}