Asymptotically safe inflation from quadratic gravity
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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 R2-θ/2 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.
Originalsprog | Engelsk |
---|---|
Tidsskrift | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Vol/bind | 750 |
Sider (fra-til) | 638-642 |
Antal sider | 5 |
ISSN | 0370-2693 |
DOI | |
Status | Udgivet - 12 nov. 2015 |
Bibliografisk note
Publisher Copyright:
© 2015 The Authors.
ID: 388514319