Parity-odd four-point correlation function from the DESI data release 1 luminous red galaxy sample
Year: 2026
Type: article
Abstract: The parity-odd four-point function provides a unique probe of fundamental symmetries and potential new physics in the large-scale structure of the Universe. We present measurements of the parity-odd four-point function using the Dark Energy Spectroscopic Instrument (DESI) DR1 luminous red galaxy (LRG) sample and assess its detection significance. Our analysis considers both auto- and cross-correlations, using two complementary approaches to the covariance: (i) the full analytic covariance matrix applied to the uncompressed data vector, and (ii) a compressed data vector combined with a hybrid covariance matrix constructed from simulations and analytic estimates. When using the full analytic covariance matrix without corrections, we observe apparent auto-correlation signals with significance up to 4 σ . However, this excess is also consistent with a mismatch between the statistical fluctuations estimated from the simulations and those present in the real data. Our findings therefore suggest that the parity-odd signal in the current DESI DR1 LRG sample is consistent with zero. We note, however, that the low completeness of this sample may have a non-negligible impact on the detection sensitivity. Future data releases with improved completeness will be crucial for further investigation.
DOI: 10.1103/2dmd-hyt1
Authors: J. Hou, R. N. Cahn, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, P. Doel, J. E. Forero-Romero, E. Gaztañaga, L. Le Guillou, G. Gutierrez, C. Howlett, D. Huterer, M. Ishak, R. Joyce, A. Kremin, O. Lahav, C. Lamman, M. Landriau, A. de la Macorra, R. Miquel, S. Nadathur, G. Niz, W. J. Percival, F. Prada, I. Pérez-Ràfols, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, H. Seo, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, H. Zou
Institutions: University of Cambridge, Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität München, Lawrence Berkeley National Laboratory, Boston University, University of Milan, Brera Astronomical Observatory, National Institute for Astrophysics, University College London, Universidad de Los Andes, Institut d'Estudis Espacials de Catalunya, University of Portsmouth, Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Énergies, Institut National de Physique Nucléaire et de Physique des Particules, Fermi National Accelerator Laboratory, The University of Queensland, University of Michigan, The University of Texas at Dallas, NSF NOIRLab, The Ohio State University, Universidad Nacional Autónoma de México, Institució Catalana de Recerca i Estudis Avançats, Barcelona Institute of Science and Technology, Universidad de Guanajuato, University of Waterloo, Perimeter Institute, Consejo Superior de Investigaciones Científicas, Instituto de Astrofísica de Andalucía, Universitat Politècnica de Catalunya, Sejong University, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Ohio University, National Astronomical Observatories
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, Heising-Simons Foundation, Ministerio de Ciencia, Innovación y Universidades, National Energy Research Scientific Computing Center, European Commission, Deutsche Forschungsgemeinschaft, Consejo Nacional de Ciencia y Tecnología, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Office of Science, Horizon 2020 Framework Programme, Science and Technology Facilities Council, Agencia Estatal de Investigación, Division of Astronomical Sciences, High Energy Physics, H2020 Marie Skłodowska-Curie Actions
Awards: G1024147905, G1044631029, G1105844351, G1175115578, G1286236842, G1813527838, G1863003419, PROPOSAL TO EXPLORE THE FUNDAMENTAL CONSTITUENTS OF THE UNIVERSE FUNDING YEARS FY 2018-2020, G2262748287, G24120701, G2601397997, G294895050, G300979063, G3083819904, G3385437720, G3452655474, G3480869486, G3681454997, G3685081974, G4042783231, G419881185, G425668148, G42916606, G4501827968, G491712853, G498139845, N-point statistics as a bridge between cosmological observations and the underlying physics, G5080475149, G5195188938, G526230902, G5635532810, G593054264, G6652958823, G6876926712, G7084143925, Management and Operations of the National Optical Astronomy Observatory, G7395345766, G7549035430, G759921648, G7805626310, G7863371703, G8345352404, G8497050386, G8667377315, G969889393
OpenAlex ID: W7143712875