Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe

Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe

In the present work, we study cosmology in dilatonic <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</...

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Bibliographic Details
Main Authors:	Francisco A. Brito, Carlos H. A. B. Borges, Jose A. V. Campos, Francisco G. Costa
Format:	Article
Language:	English
Published:	MDPI AG 2025-02-01
Series:	Universe
Subjects:	dilatonic gravity f(R,T) gravity inflation
Online Access:	https://www.mdpi.com/2218-1997/11/2/65
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Summary:	In the present work, we study cosmology in dilatonic <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></semantics></math></inline-formula> gravity to address the inflationary phase of the early universe. As usual, in dilatonic gravity, the scalar potential assumes the exponential form. However, this potential is not good enough to be in accordance with the Planck 2018 data. More strikingly, the generalized <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>β</mi></semantics></math></inline-formula>-exponential cannot take this into account either. It is just only presence of the dilatonic sector, in the intermediate coupling regime, that can help the theory to be in full accordance with the observational data.
ISSN:	2218-1997