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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2025-02-01
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| author | Francisco A. Brito Carlos H. A. B. Borges Jose A. V. Campos Francisco G. Costa |
| author_facet | Francisco A. Brito Carlos H. A. B. Borges Jose A. V. Campos Francisco G. Costa |
| author_sort | Francisco A. Brito |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-069dbc9c1619465aa2abc1d89c67b4b5 |
| institution | DOAJ |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-069dbc9c1619465aa2abc1d89c67b4b52025-08-20T02:45:41ZengMDPI AGUniverse2218-19972025-02-011126510.3390/universe11020065Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary UniverseFrancisco A. Brito0Carlos H. A. B. Borges1Jose A. V. Campos2Francisco G. Costa3Departamento de Física, Universidade Federal de Campina Grande, Caixa Postal 10071, Campina Grande 58429-900, Paraíba, BrazilInstituto Federal de Educação Ciência e Tecnologia da Paraíba(IFPB), Campus Campina Grande—Rua Tranquilino Coelho Lemos, 671, Jardim Dinamérica I, Campina Grande 58432-300, Paraíba, BrazilDepartamento de Física, Universidade Federal de Campina Grande, Caixa Postal 10071, Campina Grande 58429-900, Paraíba, BrazilInstituto Federal de Educação Ciência e Tecnologia da Paraíba(IFPB), Campus Campina Grande—Rua Tranquilino Coelho Lemos, 671, Jardim Dinamérica I, Campina Grande 58432-300, Paraíba, BrazilIn 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.https://www.mdpi.com/2218-1997/11/2/65dilatonic gravityf(R,T) gravityinflation |
| spellingShingle | Francisco A. Brito Carlos H. A. B. Borges Jose A. V. Campos Francisco G. Costa Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe Universe dilatonic gravity f(R,T) gravity inflation |
| title | Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe |
| title_full | Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe |
| title_fullStr | Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe |
| title_full_unstemmed | Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe |
| title_short | Intermediate Coupling Regime in Dilatonic f(R,T) Inflationary Universe |
| title_sort | intermediate coupling regime in dilatonic f r t inflationary universe |
| topic | dilatonic gravity f(R,T) gravity inflation |
| url | https://www.mdpi.com/2218-1997/11/2/65 |
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