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 ΛCDM 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 fNLequil=207±292, fNLorth=-68±73, fNLloc=52±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.
Limits on primordial non-Gaussianities from BOSS galaxy-clustering data / D'Amico, Guido; Lewandowski, Matthew; Senatore, Leonardo; Zhang, Pierre. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 111:6(2025). [10.1103/physrevd.111.063514]
Limits on primordial non-Gaussianities from BOSS galaxy-clustering data
D'Amico, Guido;
2025-01-01
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 ΛCDM 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 fNLequil=207±292, fNLorth=-68±73, fNLloc=52±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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
