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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28391
Title: Cosmological bounds on the field content of asymptotically safe gravity-matter models
Authors: BONANNO, Alfio Maurizio 
Platania, Alessia
Saueressig, Frank
Issue Date: 2018
Journal: PHYSICS LETTERS. SECTION B 
Number: 784
First Page: 229
Abstract: We use the non-Gaussian fixed points (NGFPs) appearing in the renormalization group flow of gravity and gravity-matter systems to construct models of NGFP-driven inflation via a renormalization group improvement scheme. The cosmological predictions of these models depend sensitively on the characteristic properties of the NGFPs, including their position and stability coefficients, which in turn are determined by the field content of the underlying matter sector. We demonstrate that the NGFPs appearing in gravity-matter systems where the matter content is close to the one of the standard model of particle physics are the ones compatible with cosmological data. Somewhat counterintuitively, the negative fixed point value of the dimensionless cosmological constant is essential for these findings.
URI: http://hdl.handle.net/20.500.12386/28391
URL: https://www.sciencedirect.com/science/article/pii/S0370269318305033?via%3Dihub
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2018.06.047
Bibcode ADS: 2018PhLB..784..229B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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