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Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Hou, J., Cahn, R. N., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., Doel, P., Forero-Romero, J. E., Gaztañaga, E., Guillou, L. Le, Gutierrez, G., Howlett, C., Ishak, M., Joyce, R., Kremin, A., Lahav, O., Lamman, C., Landriau, M., de la Macorra, A., Miquel, R., Nadathur, S., Niz, G., Percival, W. J., Prada, F., Pérez-Ràfols, I., Rossi, G., Sanchez, E., Schlegel, D., Schubnell, M., Seo, H. -J., Silber, J., Sprayberry, D., Tarlé, G., Weaver, B. A., Zou, H.
Formato:	Preprint
Publicado:	2025
Materias:	Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866909974567845888
author	Hou, J. Cahn, R. N. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. Claybaugh, T. Doel, P. Forero-Romero, J. E. Gaztañaga, E. Guillou, L. Le Gutierrez, G. Howlett, C. Ishak, M. Joyce, R. Kremin, A. Lahav, O. Lamman, C. Landriau, M. de la Macorra, A. Miquel, R. Nadathur, S. Niz, G. Percival, W. J. Prada, F. Pérez-Ràfols, I. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. -J. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zou, H.
author_facet	Hou, J. Cahn, R. N. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. Claybaugh, T. Doel, P. Forero-Romero, J. E. Gaztañaga, E. Guillou, L. Le Gutierrez, G. Howlett, C. Ishak, M. Joyce, R. Kremin, A. Lahav, O. Lamman, C. Landriau, M. de la Macorra, A. Miquel, R. Nadathur, S. Niz, G. Percival, W. J. Prada, F. Pérez-Ràfols, I. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. -J. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zou, H.
contents	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 DESI DR1 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 $4σ$. 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.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_20132
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample Hou, J. Cahn, R. N. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. Claybaugh, T. Doel, P. Forero-Romero, J. E. Gaztañaga, E. Guillou, L. Le Gutierrez, G. Howlett, C. Ishak, M. Joyce, R. Kremin, A. Lahav, O. Lamman, C. Landriau, M. de la Macorra, A. Miquel, R. Nadathur, S. Niz, G. Percival, W. J. Prada, F. Pérez-Ràfols, I. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. -J. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zou, H. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology 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 DESI DR1 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 $4σ$. 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.
title	Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample
topic	Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
url	https://arxiv.org/abs/2512.20132