Limits on primordial non-Gaussianities from BOSS galaxy-clustering data

• DOI: 10.48550/arxiv.2201.11518
• Publication Date: 2022-01-01
• Authors: D'Amico, Guido; Lewandowski, Matthew; Senatore, Leonardo; Zhang, Pierre
• Keywords: High Energy Physics - Theory; High Energy Physics - Phenomenology; Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Astrophysics - Cosmology and Nongalactic Astrophysics

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 $\textit{both}$ the power spectrum $\textit{and}$ the bispectrum. With $Λ$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 $f_{\rm NL}^{\rm equil.}= 245 \pm 293\, , f_{\rm NL}^{\rm orth.}= -60 \pm 72\, , f_{\rm NL}^{\rm loc.}= 7 \pm 31$, 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.<br/>10+22 pages, 7 figures; bugs fixed, improvements to pipeline, additional comments<br/>