{"paper":{"title":"Measuring and unbiasing the BAO shift in the Lyman-Alpha forest with AbacusSummit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Andrei Cuceu, Andreu Font-Ribera, Boryana Hadzhiyska, Henri Coquinot, Julien Guy, Mikhail M. Ivanov, Roger de Belsunce","submitted_at":"2025-03-17T17:59:09Z","abstract_excerpt":"The currently observing Dark Energy Spectroscopic Instrument (DESI) places sub-percent constraints on the Baryon Acoustic Oscillations (BAO) scaling parameters from the Lyman-$\\alpha$ (Ly-$\\alpha$) forest. However, no systematic error budget stemming from non-linearities in the 3D clustering of the Ly-$\\alpha$ forest is included in the DESI-Ly-$\\alpha$ analysis. In this work, we measure the size of the shift of the BAO peak using large Ly-$\\alpha$ forest mocks produced on the $N$-body simulation suite \\textsc{AbacusSummit}. Specifically, we measure the Ly-$\\alpha$ auto-correlation and the Ly-$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.13442","kind":"arxiv","version":1},"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/2503.13442/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"}