| Article | |
| Report number | arXiv:2009.01709 ; KCL-PH-TH/2020-44 ; CERN-TH-2020-136 ; ACT-6-20 ; MI-TH-2024, UMN-TH-3926/20 ; MI-TH-2024, UMN-TH-3926/20 ; FTPI-MINN-20/29 ; IFT-UAM/CSIC-20-126 |
| Title | Building Models of Inflation in No-Scale Supergravity |
| Author(s) | Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Madrid, IFT) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos Dimitri V. (TAMU, College Station ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.) |
| Publication | 2020-10-22 |
| Imprint | 2020-09-03 |
| Number of pages | 85 |
| Note | 84 pages, 21 figures, invited review submitted to IJMPD |
| In: | Int. J. Mod. Phys. D 29 (2020) 2030011 |
| DOI | 10.1142/S0218271820300116 |
| Subject category | hep-th ; Particle Physics - Theory ; gr-qc ; General Relativity and Cosmology ; astro-ph.CO ; Astrophysics and Astronomy ; hep-ph ; Particle Physics - Phenomenology |
| Abstract | After reviewing the motivations for cosmological inflation formulated in the formalism of supersymmetry, we argue that the appropriate framework is that of no-scale supergravity. We then show how to construct within this framework inflationary models whose predictions for the tilt in the spectrum of scalar perturbations, $n_s$, and the ratio, $r$, of tensor and scalar perturbations coincide with those of the $R + R^2$ model of inflation proposed by Starobinsky. A more detailed study of no-scale supergravity reveals a structure that is closely related to that of $R^2$ modifications of the minimal Einstein-Hilbert action for general relativity, opening avenues for constructing no-scale de Sitter and anti-de Sitter models by combining pairs of Minkowski models, as well as generalizations of the original no-scale Starobinsky models of inflation. We then discuss the phenomenology of no-scale models of inflation, including inflaton decay and reheating, and then the construction of explicit scenarios based on SU(5), SO(10) and string-motivated flipped SU(5)$\times$U(1) GUT models. The latter provides a possible model of almost everything below the Planck scale, including neutrino masses and oscillations, the cosmological baryon asymmetry and cold dark matter, as well as $n_s$ and $r$. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © World Scientific Publishing |
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