Abstract
Gravity is attributed to the spacetime curvature in classical general relativity (GR). But, other equivalent formulations or representations of GR, such as torsion or non-metricity, have altered the perception. We consider the Weyl-type f(Q, T) gravity, where Q represents the non-metricity and T is the trace of energy momentum tensor, in which the vector field \(\omega _{\mu }\) determines the non-metricity \(Q_{\mu \nu \alpha }\) of the spacetime. In this work, we employ the well-motivated \(f(Q, T)= \alpha Q+ \frac{\beta }{6k^{2}} T\), where \(\alpha \) and \(\beta \) are the model parameters. Furthermore, we assume that the universe is dominated by the pressure-free matter, i.e., the case of dust (\(p=0\)). We obtain the solution of field equations similar to a power-law in Hubble parameter H(z). We investigate the cosmological implications of the model by constraining the model parameter \(\alpha \) and \(\beta \) using the recent 57 points Hubble data and 1048 points Pantheon supernovae data. To study various dark energy models, we use statefinder analysis to address the current cosmic acceleration. We also observe the Om diagnostic describing various phases of the universe. Finally, it is seen that the solution which mimics the power-law fits well with the Pantheon data than the Hubble data.
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Acknowledgements
GG RS acknowledges University Grants Commission (UGC), New Delhi, India for awarding Junior Research Fellowship (UGC-Ref. No.: 201610122060). SA acknowledges CSIR, Govt. of India, New Delhi, for awarding Junior Research Fellowship. PKS acknowledges CSIR, New Delhi, India for financial support to carry out the Research project [No.03(1454)/19/EMR-II Dt.02/08/2019]. We are very much grateful to the honorable referee and the editor for the illuminating suggestions that have significantly improved our work in terms of research quality and presentation.
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Appendix
Appendix
Here, Table 1 contains the 57 points of Hubble parameter values H(z) with errors \(\sigma _{H}\) from differential age (31 points), and BAO and other (26 points) approaches, along with references.
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Gadbail, G., Arora, S. & Sahoo, P.K. Power-law cosmology in Weyl-type f(Q, T) gravity. Eur. Phys. J. Plus 136, 1040 (2021). https://doi.org/10.1140/epjp/s13360-021-02048-w
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DOI: https://doi.org/10.1140/epjp/s13360-021-02048-w