{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/constraints-on-single-field-inflation-from","title":"Constraints on Single-Field Inflation from the BOSS Galaxy Survey","arxiv_id":"2201.07238","date":"2022-01-18","proceeding":null,"authors":["Giovanni Cabass","Mikhail M. Ivanov","Oliver H. E. Philcox","Marko Simonović","Matias Zaldarriaga"],"abstract":"Non-local primordial non-Gaussianity (NLPNG) is a smoking gun of interactions in single-field inflationary models, and can be written as a combination of the equilateral and orthogonal templates. We present the first constraints on these from the redshift-space galaxy power spectra and bispectra of the Baryon Oscillation Spectroscopic Survey (BOSS) data. These are the first such measurements independent of the cosmic microwave background fluctuations. We perform a consistent analysis that includes all necessary nonlinear corrections generated by NLPNG, and vary all relevant cosmological and nuisance parameters in a global fit to the data. Our conservative analysis yields joint limits on the amplitudes of the equilateral and orthogonal shapes, $f_{\\rm NL}^{\\rm equil}=940\\pm 600$, $f_{\\rm NL}^{\\rm ortho}= -170\\pm 170$ (both at 68\\% CL). These can be used to derive constraints on coefficients of the effective single-field inflationary Lagrangian; in particular, we find that the sound speed of inflaton fluctuations has the bound $c_s\\geq 0.013$ at 95\\% CL. Fixing the quadratic galaxy bias and cosmological parameters, the constraints can be tightened to $f_{\\rm NL}^{\\rm equil}=260\\pm 300$, $f_{\\rm NL}^{\\rm ortho}= -23\\pm 120$ (68\\% CL).","url_abs":"https://arxiv.org/abs/2201.07238v1","url_pdf":"https://arxiv.org/pdf/2201.07238v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"constraints-on-single-field-inflation-from","repo_url":"https://github.com/oliverphilcox/full_shape_likelihoods","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":1,"framework":"none","reach":null},{"paper_slug":"constraints-on-single-field-inflation-from","repo_url":"https://github.com/Michalychforever/CLASS-PT","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}