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Light mass galileon and late time acceleration of the Universe

We study Galileon scalar field model by considering the lowest order Galileon term in the lagrangian, $(\partial_μ ϕ)^2 \Boxϕ$ by invoking a field potential. We use Statefinder hierarchy to distinguish the light mass galileon models with different potentials amongst themselves and from the $Λ$CDM behaviour. The $Om$ diagnostic is applied to cosmological dynamics and observational constraints on the model parameters are studied using SN+Hubble+BAO data.

preprint2015arXivOpen access

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