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Inflation with non-canonical scalar fields revisited
- Source :
- European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-9 (2021), European Physical Journal
- Publication Year :
- 2021
- Publisher :
- SpringerOpen, 2021.
-
Abstract
- We revisit inflation with non-canonical scalar fields by applying deformed-steepness exponential potentials. We show that the resulting scenario can lead to inflationary observables, and in particular to scalar spectral index and tensor-to-scalar ratio, in remarkable agreement with observations. Additionally, a significant advantage of the scenario is that the required parameter values, such as the non-canonicality exponent and scale, as well as the potential exponent and scale, do not need to acquire unnatural values and hence can accept a theoretical justification. Hence, we obtain a significant improvement with respect to alternative schemes, and we present distinct correlations between the model parameters that better fit the data, which can be tested in future probes. This combination of observational efficiency and theoretical justification makes the scenario at hand a good candidate for the description of inflation.<br />Comment: 15 pages, 6 figures, 2 tables
- Subjects :
- High Energy Physics - Theory
Inflation
Physics
Spectral index
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous)
Scale (ratio)
media_common.quotation_subject
Scalar (physics)
FOS: Physical sciences
Observable
General Relativity and Quantum Cosmology (gr-qc)
QC770-798
Astrophysics
General Relativity and Quantum Cosmology
Exponential function
QB460-466
High Energy Physics - Theory (hep-th)
Non canonical
Nuclear and particle physics. Atomic energy. Radioactivity
Exponent
Statistical physics
Engineering (miscellaneous)
Astrophysics - Cosmology and Nongalactic Astrophysics
media_common
Subjects
Details
- Language :
- English
- ISSN :
- 14346052 and 14346044
- Volume :
- 81
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- European Physical Journal C: Particles and Fields
- Accession number :
- edsair.doi.dedup.....dc89c8f0c5e55683850b67adbaae199a