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Cosmological scattering equations
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SYSNO ASEP 0552334 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cosmological scattering equations Author(s) Gomez, H. (GB)
Jusinskas, Renann Lipinski (FZU-D) ORCID
Lipstein, A. (GB)Number of authors 3 Article number A47 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 127, č. 25 (2021)Number of pages 7 s. Language eng - English Country US - United States Keywords correlation function: scalar ; space: de Sitter ; field theory: scalar Subject RIV BE - Theoretical Physics OECD category Particles and field physics R&D Projects GJ19-06342Y GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000760569100009 EID SCOPUS 85122052827 DOI 10.1103/PhysRevLett.127.251604 Annotation We propose a world sheet formula for tree-level correlation functions describing a scalar field with arbitrary mass and quartic self-interaction in de Sitter space, which is a simple model for inflationary cosmology. The correlation functions are located on the future boundary of the spacetime and are Fourier-transformed to momentum space. Our formula is supported on mass-deformed scattering equations involving conformal generators in momentum space and reduces to the CHY formula for ϕ4 amplitudes in the flat space limit. Using the global residue theorem, we verify that it reproduces the Witten diagram expansion at four and six points, and sketch the extension to n points. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0327478
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