https://doi.org/10.1140/epjc/s10052-024-13237-z
Regular Article - Theoretical Physics
Investigating early and late-time epochs in f(Q) gravity
Department of Mathematics, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, 500078, Hyderabad, India
c
pksahoo@hyderabad.bits-pilani.ac.in
Received:
4
February
2024
Accepted:
13
August
2024
Published online:
2
September
2024
In the following work, a new hybrid model of the form 
has been proposed and confronted using both early as well as late-time constraints. We first use conditions from the era of Big Bang Nucleosynthesis (BBN) in order to constrain the models which are further used to study the evolution of the Universe through the deceleration parameter. This methodology is employed for the hybrid model as well as a simple model of the form 
which is found to reduce to 
CDM. The error bar plot for the Cosmic Chronometer (CC) and Pantheon+SH0ES datasets which includes the comparison with CDM, has been studied for the constrained hybrid model. Additionally, we perform a Monte Carlo Markov Chain (MCMC) sampling of the model against three datasets – CC, Pantheon+SH0ES, and Baryon Acoustic Oscillations (BAO) to find the best-fit ranges of the free parameters. It is found that the constraint range of the model parameter (a) from the BBN study has a region of overlap with the ranges obtained from the MCMC analysis. Finally, we perform a statistical comparison between our model and the CDM model using AIC and BIC method.
© The Author(s) 2024
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Funded by SCOAP3.
