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On inflation scenarios and dark energy in a scaled gravity

Département de Physique Equipe des Sciences, de la matière et du rayonnement ESMaR Faculté des Sciences, Université Mohammed V de Rabat, Rabat, Morocco

E-mail Address: a-belhaj@um5r.ac.ma

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M. Benali

Département de Physique Equipe des Sciences, de la matière et du rayonnement ESMaR Faculté des Sciences, Université Mohammed V de Rabat, Rabat, Morocco

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S.-E. Ennadifi

LPHE-MS, Faculté des Sciences, Université Mohammed V de Rabat, Rabat, Morocco

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M. Lamaaoune

Département de Physique Equipe des Sciences, de la matière et du rayonnement ESMaR Faculté des Sciences, Université Mohammed V de Rabat, Rabat, Morocco

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, and

M. Oualaid

Département de Physique Equipe des Sciences, de la matière et du rayonnement ESMaR Faculté des Sciences, Université Mohammed V de Rabat, Rabat, Morocco

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https://doi.org/10.1142/S0219887823501670Cited by:2 (Source: Crossref)

Abstract

In this paper, we investigate an inflation scenario and dark energy in a scaled gravity, $R + β R$ where $β$ is a dimensionless gravity parameter, with a kinetic term. To reduce the associated moduli space, we implement such a parameter in a specific scalar potential given by $V (ϕ) = M^{4} (1 - {(\frac{ϕ}{μ})}^{β})$ . By computing the relevant cosmological observables including the spectral index $n_{s}$ and the tensor-to-scalar ratio $r$ via the slow-roll analysis, we provide certain inflationary constraints on $β$ from the Planck observational and the recent released BICEP/Keck data. By means of a possible Higgs-inflaton coupling, we discuss dark energy in the proposed scaled gravity within such an inflation model.

Keywords:

AMSC: 98.80.Cq, 04.50.Kd, 98.80.Es, 42.50Lc, 95.36.+x

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