English

Observational constraints on non-minimally coupled Galileon model

General Physics 2014-08-04 v4 Cosmology and Nongalactic Astrophysics

Abstract

As an extension of Dvali-Gabadadze-Porrati (DGP) model, the Galileon theory has been proposed to explain the "self-accelerating problem" and "ghost instability problem". In this Paper, we extend the Galileon theory by considering a non-minimally coupled Galileon scalar with gravity. The statefinder analysis, Om(z)Om(z) diagnostic and constraint the model parameters have been investigate , we find Ωm0=0.2630.031+0.031\Omega_\text{m0}=0.263_{-0.031}^{+0.031}, n=1.530.37+0.21n=1.53_{-0.37}^{+0.21} (at the 95%95\% confidence level) with χmin2=473.376\chi^2_{\text{min}}=473.376. Further we show that due to the SNe Ia + BAO data ,our model behaves like a phantom-like dark energy.

Keywords

Cite

@article{arxiv.1302.0129,
  title  = {Observational constraints on non-minimally coupled Galileon model},
  author = {Mubasher Jamil and Davood Momeni and Ratbay Myrzakulov},
  journal= {arXiv preprint arXiv:1302.0129},
  year   = {2014}
}

Comments

Matched with published version, replaced to remove text overlaps

R2 v1 2026-06-21T23:19:08.320Z