Quintessential inflation with α-attractors
By Konstantinos Dimopoulos, Charlotte Owen. 2017
154 citations recorded by the source corpus.
A novel approach to quintessential inflation model building is studied, within the framework of α-attractors, motivated by supergravity theories. Inflationary observables are in excellent agreement with the latest CMB observations, while quintessence explains the dark energy observations without any fine-tuning. The model is kept intentionally minimal, avoiding the introduction of many degrees of freedom, couplings and mass scales. In stark contrast to ΛCDM, for natural values of the parameters, the model attains transient accelerated expansion, which avoids the future horizon problem, while it maintains the field displacement mildly sub-Planckian such that the flatness of the quintessential tail is not lifted by radiative corrections and violations of the equivalence principle (fifth force) are under control. In particular, the required value of the cosmological constant is near the eletroweak scale. Attention is paid to the reheating of the Universe, which avoids gravitino overproduction and respects nucleosynthesis constraints. Kination is treated in a model independent way. A spike in gravitational waves, due to kination, is found not to disturb nucleosynthesis as well.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/c47ee9f19a846076d20490699da2cfdba560b630
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In Astronomy and Astrophysics
- Tanvi Karwal
- Tristan L. Smith
- V. Poulin
- S. Vagnozzi
- S. Alexander
- Mikhail Ivanov
- John C. Hill
- M. Toomey
In Nuclear and High Energy Physics
- Tanvi Karwal
- Tristan L. Smith
- V. Poulin
- S. Vagnozzi
- S. Alexander
- Mikhail Ivanov
- John C. Hill
- M. Toomey
In Statistical and Nonlinear Physics
Citations in the corpus
- The Ups and Downs of Early Dark Energy solutions to the Hubble tension: A review of models, hints and constraints circa 2023 (2023, background): “[127] Konstantinos Dimopoulos and Charlotte Owen, “Quintessential Inflation with α-attractors,” JCAP 06, 027 (2017), arXiv:1703.”