Year: 2025
Type: article
Abstract: We analyze the power spectrum and the bispectrum of BOSS galaxy-clustering data using the prediction from the effective field theory of large-scale structure at one-loop order for both the power spectrum and the bispectrum. With $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ parameters fixed to Planck preferred values, we set limits on three templates of non-Gaussianities predicted by many inflationary models: the equilateral, the orthogonal, and the local shapes. After validating our analysis against simulations, we find ${f}_{\mathrm{NL}}^{\mathrm{equil}}=207\ifmmode\pm\else\textpm\fi{}292$, ${f}_{\mathrm{NL}}^{\mathrm{orth}}=\ensuremath{-}68\ifmmode\pm\else\textpm\fi{}73$, ${f}_{\mathrm{NL}}^{\mathrm{loc}}=52\ifmmode\pm\else\textpm\fi{}34$, at 68% confidence level. These bispectrum-based constraints from large-scale structure, not far from the ones of WMAP, suggest promising results from upcoming surveys.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, Northwestern University, Massachusetts Green High Performance Computing Center, Eidgenössische Technische Hochschule Zürich, Università degli Studi di Parma, University of Science and Technology of China, Weinberg College of Arts and Sciences, Northwestern University
OpenAlex ID: W4408216834