Report number
| arXiv:2204.01781 ; CERN-TH-2022-055 |
Title
| Constraints on multifield inflation from the BOSS galaxy survey |
Related title | Constraints on Multi-Field Inflation from the BOSS Galaxy Survey
|
Author(s)
| Cabass, Giovanni (Princeton, Inst. Advanced Study) ; Ivanov, Mikhail M. (Princeton, Inst. Advanced Study) ; Philcox, Oliver H.E. (Princeton U., Astrophys. Sci. Dept. ; Princeton, Inst. Advanced Study) ; Simonović, Marko (CERN) ; Zaldarriaga, Matias (Princeton, Inst. Advanced Study) |
Publication
| 2022-08-03 |
Imprint
| 2022-04-04 |
Number of pages
| 20 |
Note
| 20 pages, 5 figures |
In:
| Phys. Rev. D 106 (2022) 043506 |
DOI
| 10.1103/PhysRevD.106.043506 (publication)
|
Subject category
| hep-th ; Particle Physics - Theory ; hep-ph ; Particle Physics - Phenomenology ; gr-qc ; General Relativity and Cosmology ; astro-ph.CO ; Astrophysics and Astronomy |
Abstract
| We use redshift-space galaxy clustering data from the BOSS survey to constrain local primordial non-Gaussianity (LPNG). This is of particular importance due to the consistency relations, which imply that a detection of LPNG would rule out all single-field inflationary models. Our constraints are based on the consistently analyzed redshift-space galaxy power spectra and bispectra, extracted from the public BOSS data with optimal window-free estimators. We use a complete perturbation theory model including all one-loop power spectrum corrections generated by LPNG. Our constraint on the amplitude of the local non-Gaussian shape is flocalNL=−33±28 at 68% CL, yielding no evidence for primordial non-Gaussianity. The addition of the bispectrum tightens the flocalNL constraints from BOSS by 20%, and allows breaking of degeneracies with non-Gaussian galaxy bias. These results set the stage for the analysis of future surveys, whose larger volumes will yield significantly tighter constraints on LPNG. |
Copyright/License
| publication: © 2022-2024 American Physical Society preprint: (License: CC BY 4.0) |