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http://hdl.handle.net/20.500.12386/24045
Titolo: | Asymptotically safe inflation from quadratic gravity | Autori: | BONANNO, Alfio Maurizio Platania, Alessia |
Data pubblicazione: | 2015 | Rivista: | PHYSICS LETTERS. SECTION B | Numero: | 750 | Da pagina:: | 638 | Abstract: | Asymptotically Safe theories of gravity have recently received much attention. In this work we discuss a class of inflationary models derived from quantum-gravity modification of quadratic gravity according to the induced scaling around the non-Gaussian fixed point at very high energies. It is argued that the presence of a three dimensional ultraviolet critical surface generates operators of non-integer power of the type <SUP>R 2 - θ / 2</SUP> in the effective Lagrangian, where θ > 0 is a critical exponent. The requirement of a successful inflationary model in agreement with the recent Planck 2015 data puts important constraints on the strength of this new type of couplings. | Acknowledgments: | Acknowledgements The authors would like to thank Gian Paolo Vacca and Sergey Vernov for important suggestions and comments. | URI: | http://hdl.handle.net/20.500.12386/24045 | URL: | https://www.sciencedirect.com/science/article/pii/S037026931500756X?via%3Dihub | ISSN: | 0370-2693 | DOI: | 10.1016/j.physletb.2015.10.005 | Bibcode ADS: | 2015PhLB..750..638B | Fulltext: | open |
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