Cosmological bounds on the field content of asymptotically safe gravity–matter models
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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.
Original language | English |
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Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 784 |
Pages (from-to) | 229-236 |
Number of pages | 8 |
ISSN | 0370-2693 |
DOIs | |
Publication status | Published - 10 Sep 2018 |
Bibliographical note
Funding Information:
We thank G. Gubitosi for interesting discussions. The research of A.P. is supported by the DFG under grant no Ei-1037/1 . F.S. is supported by the Netherlands Organisation for Scientific Research (NWO) within the Foundation for Fundamental Research on Matter (FOM) grants 13VP12 and 13PR3137 .
Funding Information:
We thank G. Gubitosi for interesting discussions. The research of A.P. is supported by the DFG under grant no Ei-1037/1. F.S. is supported by the Netherlands Organisation for Scientific Research (NWO) within the Foundation for Fundamental Research on Matter (FOM) grants 13VP12 and 13PR3137.
Publisher Copyright:
© 2018 The Author(s)
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