Parity-odd four-point correlation function from the DESI data release 1 luminous red galaxy sample

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 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mn>4</a:mn> <a:mi>σ</a:mi> </a:math> . 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.

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Journal
Physical review. D/Physical review. D.
Published
2026-03-31
DOI
https://doi.org/10.1103/2dmd-hyt1
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

Parity-odd four-point correlation function from the DESI data release 1 luminous red galaxy sample

Anonymous
Physical review. D/Physical review. D.
Galaxies: Formation, Evolution, Phenomena
article

Parity-odd four-point correlation function from the DESI data release 1 luminous red galaxy sample

Anonymous
article en

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 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mn>4</a:mn> <a:mi>σ</a:mi> </a:math> . 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.

Physical review. D/Physical review. D.Vol. 113(10)
Institució Catalana de Recerca i Estudis Avançats (ES), Universidad de Guanajuato (MX), Fermi National Accelerator Laboratory (US), Institute of Space Sciences (ES), Lawrence Berkeley National Laboratory (US), University of Waterloo (CA), The University of Texas at Dallas (US), The University of Queensland (AU), Perimeter Institute (CA), University of Milan (IT), University of Cambridge (GB), University of Michigan (US), Brera Astronomical Observatory (IT), Sejong University (KR), Sorbonne Université (FR), Max Planck Institute for Extraterrestrial Physics (DE), Institut d'Estudis Espacials de Catalunya (ES), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Ohio University (US), Instituto de Estudios Avanzados (VE), Barcelona Institute of Science and Technology (ES), Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of Space Science - INFLPR Subsidiary (RO), Universidad de Los Andes (BO), Instituto de Astrofísica de Andalucía (ES), National Astronomical Observatories (CN), Laboratoire Médiations (FR), Institute of Science and Technology, University College London (GB), The Ohio State University (US), University of Portsmouth (GB), Ludwig-Maximilians-Universität München (DE), Universidad Nacional Autónoma de México (MX), Universitat Politècnica de Catalunya (ES)
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, 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, Division of Astronomical Sciences, High Energy Physics, H2020 Marie Skłodowska-Curie Actions
Openalex Percentile: Top 34%
Galaxies: Formation, Evolution, Phenomena
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