Non-Oscillatory No-Scale Inflation
Aug 20, 2020
31 pages
Published in:
- JCAP 03 (2021) 052
- Published: Mar 16, 2021
e-Print:
- 2008.09099 [hep-ph]
Report number:
- UMN-TH-3924/20,
- FTPI-MINN-20/27,
- KCL-PH-TH/2020-38, CERN-TH-2020-123,
- ACT-05-20,
- MI-TH-2020
Citations per year
Abstract: (IOP)
We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). During the transition from inflation to kination, the Universe preheats instantly through a coupling to Higgs-like fields. These rapidly annihilate and scatter into ultra-relativistic matter particles, which subsequently dominate the energy density, and reheating occurs at a temperature far above that of Big Bang Nucleosynthesis. After the electroweak transition, the inflaton enters a tracking phase as in some models of quintessential inflation. The model predictions for cosmic microwave background observables are consistent with Planck 2018 data, and the density of gravitational waves is below the upper bound from Big Bang Nucleosynthesis. We also find that the density of supersymmetric cold dark matter produced by gravitino decay is consistent with Planck 2018 data over the expected range of supersymmetric particle masses.Note:
- 16 pages, 7 figures, accepted for publication in JCAP
- energy: density
- nucleosynthesis: big bang
- inflation: model
- gravitino: decay
- sparticle: mass
- energy: kinetic
- inflaton
- satellite: Planck
- cosmic background radiation: temperature
- electroweak interaction
References(157)
Figures(7)