https://doi.org/10.1140/epjp/s13360-024-04955-0
Regular Article
Cosmic expansion beyond
CDM: investigating power-law and logarithmic corrections
1
Department of Physics, University of Hassan II Casablanca, Casablanca, Morocco
2
Department of P.G. Studies and Research in Mathematics, Kuvempu University, Shankaraghatta, 577451, Shivamogga, Karnataka, India
3
L. N. Gumilyov Eurasian National University, 010008, Astana, Kazakhstan
Received:
8
November
2023
Accepted:
29
January
2024
Published online:
20
February
2024
The cosmic acceleration observed in the expansion of the Universe has sparked extensive research into the nature of dark energy, which is known to constitute approximately 70% of the Universe’s energy content. In this study, we explore two parametrizations of the Hubble parameter, namely power-law and logarithmic corrections, as alternatives to the standard CDM model. Using observational data from Cosmic Chronometers (CC), Pantheon+, and the Baryonic Acoustic Oscillations (BAO) datasets, we investigate the dynamics of essential cosmological parameters, including the deceleration parameter, energy density, pressure, and equation of state (EoS) parameter. The Om(z) diagnostic test is employed to classify different dark energy models. Our cosmological models, with the power-law and logarithmic corrections, are found to provide a good fit to the recent observational data and efficiently describe the cosmic expansion scenario.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.