Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples

S. Novell-Masot; H. Gil-Marín; L. Verde; J. Aguilar; S. Ahlen; S. Bailey; S. BenZvi; D. Bianchi; D. Brooks; E. Buckley-Geer; A. Carnero Rosell; E. Chaussidon; T. Claybaugh; S. Cole; A. Cuceu; K. S. Dawson; A. de la Macorra; R. Demina; A. Dey; B. Dey; P. Doel; S. Ferraro; A. Font-Ribera; J. E. Forero-Romero; E. Gaztañaga; S. A. Gontcho Gontcho; A. X. Gonzalez-Morales; G. Gutierrez; H. K. Herrera-Alcantar; K. Honscheid; C. Howlett; S. Juneau; R. Kehoe; D. Kirkby; T. Kisner; A. Kremin; C. Lamman; M. Landriau; L. Le Guillou; M. E. Levi; C. Magneville; M. Manera; A. Meisner; R. Miquel; J. Moustakas; A. Muñoz-Gutiérrez; A. D. Myers; S. Nadathur; G. Niz; H. E. Noriega; W. J. Percival; C. Poppett; F. Prada; I. Pérez-Ràfols; A. J. Ross; G. Rossi; L. Samushia; E. Sanchez; D. Schlegel; M. Schubnell; H. Seo; J. Silber; D. Sprayberry; G. Tarlé; M. Vargas-Magaña; B. A. Weaver; P. Zarrouk; R. Zhou; H. Zou

doi:10.1088/1475-7516/2025/06/005

Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples

S. Novell-Masot
, H. Gil-Marín
, L. Verde
, J. Aguilar
, S. Ahlen
, S. Bailey
, S. BenZvi
, D. Bianchi
, D. Brooks
, E. Buckley-Geer
, A. Carnero Rosell
, E. Chaussidon
, T. Claybaugh
, S. Cole
, A. Cuceu
, K. S. Dawson
, A. de la Macorra
, R. Demina
, A. Dey
, B. Dey

P. Doel, S. Ferraro, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. A. Gontcho Gontcho, A. X. Gonzalez-Morales, G. Gutierrez, H. K. Herrera-Alcantar, K. Honscheid, C. Howlett, S. Juneau, R. Kehoe, D. Kirkby, T. Kisner, A. Kremin, C. Lamman, M. Landriau, L. Le Guillou, M. E. Levi, C. Magneville, M. Manera, A. Meisner, R. Miquel, J. Moustakas, A. Muñoz-Gutiérrez, A. D. Myers, S. Nadathur, G. Niz, H. E. Noriega, W. J. Percival, C. Poppett, F. Prada, I. Pérez-Ràfols, A. J. Ross, G. Rossi, L. Samushia, E. Sanchez, D. Schlegel, M. Schubnell, H. Seo, J. Silber, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, B. A. Weaver, P. Zarrouk, R. Zhou, H. Zou

Research output: Indexed journal article › Article › peer-review

3 Citations (Web of Science)

Abstract

We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of 0.4 ≤ z ≤ 2.1. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, f(z), and the amplitude of dark matter fluctuations, σ_s8(z), which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck ΛCDM cosmology we obtain (formula Presented) respectively for the three LRG redshift bins, corresponding to a cumulative 10.1% constraint on f, and of 8.4% on σ_s8, including the systematic error budget. Additionally, we obtain constraints for the ShapeFit compressed parameters describing the isotropic scaling parameter, α_iso(z), the Alcock-Paczyński parameter, α_AP(z), the combined growth of structure parameter fσ_s8(z), and the combined shape parameter m(z) + n(z). Their cumulative constraints from our joint power spectrum-bispectrum analysis are respectively σ_α_iso = 0.9% (9% improvement with respect to our power spectrum-only analysis); σ_α_AP = 2.3% (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); σ_fσ_s8 = 5.1% (9% improvement); σ_m+_n = 2.3% (11% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck ΛCDM cosmology.

Original language	English
Article number	005
Number of pages	56
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2025
Issue number	6
DOIs	https://doi.org/10.1088/1475-7516/2025/06/005
Publication status	Published - 6 Jun 2025
Externally published	Yes

Keywords

cosmological parameters from LSS
power spectrum
redshift surveys

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10.1088/1475-7516/2025/06/005Licence: CC BY

Cite this

Novell-Masot, S., Gil-Marín, H., Verde, L., Aguilar, J., Ahlen, S., Bailey, S., BenZvi, S., Bianchi, D., Brooks, D., Buckley-Geer, E., Carnero Rosell, A., Chaussidon, E., Claybaugh, T., Cole, S., Cuceu, A., Dawson, K. S., de la Macorra, A., Demina, R., Dey, A., ... Zou, H. (2025). Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples. Journal of Cosmology and Astroparticle Physics, 2025(6), Article 005. https://doi.org/10.1088/1475-7516/2025/06/005

@article{726504bb0e7e467b99bf4dc2058fb047,

title = "Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples",

abstract = "We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of 0.4 ≤ z ≤ 2.1. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, f(z), and the amplitude of dark matter fluctuations, σs8(z), which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck ΛCDM cosmology we obtain (formula Presented) respectively for the three LRG redshift bins, corresponding to a cumulative 10.1\% constraint on f, and of 8.4\% on σs8, including the systematic error budget. Additionally, we obtain constraints for the ShapeFit compressed parameters describing the isotropic scaling parameter, αiso(z), the Alcock-Paczy{\'n}ski parameter, αAP(z), the combined growth of structure parameter fσs8(z), and the combined shape parameter m(z) + n(z). Their cumulative constraints from our joint power spectrum-bispectrum analysis are respectively σαiso = 0.9\% (9\% improvement with respect to our power spectrum-only analysis); σαAP = 2.3\% (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); σfσs8 = 5.1\% (9\% improvement); σm+n = 2.3\% (11\% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck ΛCDM cosmology.",

keywords = "cosmological parameters from LSS, power spectrum, redshift surveys",

author = "S. Novell-Masot and H. Gil-Mar{\'i}n and L. Verde and J. Aguilar and S. Ahlen and S. Bailey and S. BenZvi and D. Bianchi and D. Brooks and E. Buckley-Geer and \{Carnero Rosell\}, A. and E. Chaussidon and T. Claybaugh and S. Cole and A. Cuceu and Dawson, \{K. S.\} and \{de la Macorra\}, A. and R. Demina and A. Dey and B. Dey and P. Doel and S. Ferraro and A. Font-Ribera and Forero-Romero, \{J. E.\} and E. Gazta{\~n}aga and \{Gontcho Gontcho\}, \{S. A.\} and Gonzalez-Morales, \{A. X.\} and G. Gutierrez and Herrera-Alcantar, \{H. K.\} and K. Honscheid and C. Howlett and S. Juneau and R. Kehoe and D. Kirkby and T. Kisner and A. Kremin and C. Lamman and M. Landriau and \{Le Guillou\}, L. and Levi, \{M. E.\} and C. Magneville and M. Manera and A. Meisner and R. Miquel and J. Moustakas and A. Mu{\~n}oz-Guti{\'e}rrez and Myers, \{A. D.\} and S. Nadathur and G. Niz and Noriega, \{H. E.\} and Percival, \{W. J.\} and C. Poppett and F. Prada and I. P{\'e}rez-R{\`a}fols and Ross, \{A. J.\} and G. Rossi and L. Samushia and E. Sanchez and D. Schlegel and M. Schubnell and H. Seo and J. Silber and D. Sprayberry and G. Tarl{\'e} and M. Vargas-Maga{\~n}a and Weaver, \{B. A.\} and P. Zarrouk and R. Zhou and H. Zou",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s).",

year = "2025",

month = jun,

day = "6",

doi = "10.1088/1475-7516/2025/06/005",

language = "English",

volume = "2025",

journal = "Journal of Cosmology and Astroparticle Physics",

issn = "1475-7516",

publisher = "Institute of Physics",

number = "6",

}

Novell-Masot, S, Gil-Marín, H, Verde, L, Aguilar, J, Ahlen, S, Bailey, S, BenZvi, S, Bianchi, D, Brooks, D, Buckley-Geer, E, Carnero Rosell, A, Chaussidon, E, Claybaugh, T, Cole, S, Cuceu, A, Dawson, KS, de la Macorra, A, Demina, R, Dey, A, Dey, B, Doel, P, Ferraro, S, Font-Ribera, A, Forero-Romero, JE, Gaztañaga, E, Gontcho Gontcho, SA, Gonzalez-Morales, AX, Gutierrez, G, Herrera-Alcantar, HK, Honscheid, K, Howlett, C, Juneau, S, Kehoe, R, Kirkby, D, Kisner, T, Kremin, A, Lamman, C, Landriau, M, Le Guillou, L, Levi, ME, Magneville, C, Manera, M, Meisner, A, Miquel, R, Moustakas, J, Muñoz-Gutiérrez, A, Myers, AD, Nadathur, S, Niz, G, Noriega, HE, Percival, WJ, Poppett, C, Prada, F, Pérez-Ràfols, I, Ross, AJ, Rossi, G, Samushia, L, Sanchez, E, Schlegel, D, Schubnell, M, Seo, H, Silber, J, Sprayberry, D, Tarlé, G, Vargas-Magaña, M, Weaver, BA, Zarrouk, P, Zhou, R & Zou, H 2025, 'Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples', Journal of Cosmology and Astroparticle Physics, vol. 2025, no. 6, 005. https://doi.org/10.1088/1475-7516/2025/06/005

TY - JOUR

T1 - Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples

AU - Novell-Masot, S.

AU - Gil-Marín, H.

AU - Verde, L.

AU - Aguilar, J.

AU - Ahlen, S.

AU - Bailey, S.

AU - BenZvi, S.

AU - Bianchi, D.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Carnero Rosell, A.

AU - Chaussidon, E.

AU - Claybaugh, T.

AU - Cole, S.

AU - Cuceu, A.

AU - Dawson, K. S.

AU - de la Macorra, A.

AU - Demina, R.

AU - Dey, A.

AU - Dey, B.

AU - Doel, P.

AU - Ferraro, S.

AU - Font-Ribera, A.

AU - Forero-Romero, J. E.

AU - Gaztañaga, E.

AU - Gontcho Gontcho, S. A.

AU - Gonzalez-Morales, A. X.

AU - Gutierrez, G.

AU - Herrera-Alcantar, H. K.

AU - Honscheid, K.

AU - Howlett, C.

AU - Juneau, S.

AU - Kehoe, R.

AU - Kirkby, D.

AU - Kisner, T.

AU - Kremin, A.

AU - Lamman, C.

AU - Landriau, M.

AU - Le Guillou, L.

AU - Levi, M. E.

AU - Magneville, C.

AU - Manera, M.

AU - Meisner, A.

AU - Miquel, R.

AU - Moustakas, J.

AU - Muñoz-Gutiérrez, A.

AU - Myers, A. D.

AU - Nadathur, S.

AU - Niz, G.

AU - Noriega, H. E.

AU - Percival, W. J.

AU - Poppett, C.

AU - Prada, F.

AU - Pérez-Ràfols, I.

AU - Ross, A. J.

AU - Rossi, G.

AU - Samushia, L.

AU - Sanchez, E.

AU - Schlegel, D.

AU - Schubnell, M.

AU - Seo, H.

AU - Silber, J.

AU - Sprayberry, D.

AU - Tarlé, G.

AU - Vargas-Magaña, M.

AU - Weaver, B. A.

AU - Zarrouk, P.

AU - Zhou, R.

AU - Zou, H.

PY - 2025/6/6

Y1 - 2025/6/6

N2 - We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of 0.4 ≤ z ≤ 2.1. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, f(z), and the amplitude of dark matter fluctuations, σs8(z), which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck ΛCDM cosmology we obtain (formula Presented) respectively for the three LRG redshift bins, corresponding to a cumulative 10.1% constraint on f, and of 8.4% on σs8, including the systematic error budget. Additionally, we obtain constraints for the ShapeFit compressed parameters describing the isotropic scaling parameter, αiso(z), the Alcock-Paczyński parameter, αAP(z), the combined growth of structure parameter fσs8(z), and the combined shape parameter m(z) + n(z). Their cumulative constraints from our joint power spectrum-bispectrum analysis are respectively σαiso = 0.9% (9% improvement with respect to our power spectrum-only analysis); σαAP = 2.3% (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); σfσs8 = 5.1% (9% improvement); σm+n = 2.3% (11% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck ΛCDM cosmology.

AB - We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of 0.4 ≤ z ≤ 2.1. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, f(z), and the amplitude of dark matter fluctuations, σs8(z), which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck ΛCDM cosmology we obtain (formula Presented) respectively for the three LRG redshift bins, corresponding to a cumulative 10.1% constraint on f, and of 8.4% on σs8, including the systematic error budget. Additionally, we obtain constraints for the ShapeFit compressed parameters describing the isotropic scaling parameter, αiso(z), the Alcock-Paczyński parameter, αAP(z), the combined growth of structure parameter fσs8(z), and the combined shape parameter m(z) + n(z). Their cumulative constraints from our joint power spectrum-bispectrum analysis are respectively σαiso = 0.9% (9% improvement with respect to our power spectrum-only analysis); σαAP = 2.3% (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); σfσs8 = 5.1% (9% improvement); σm+n = 2.3% (11% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck ΛCDM cosmology.

KW - cosmological parameters from LSS

KW - power spectrum

KW - redshift surveys

UR - https://www.scopus.com/pages/publications/105010349495

U2 - 10.1088/1475-7516/2025/06/005

DO - 10.1088/1475-7516/2025/06/005

M3 - Article

AN - SCOPUS:105010349495

SN - 1475-7516

VL - 2025

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 6

M1 - 005

ER -

Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples

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