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Light mass Galileon and late time acceleration of the Universe

Research Article

Abstract

We study Galileon scalar field model by considering the lowest order Galileon term in the Lagrangian, \((\partial _{\mu } \phi )^2 \Box \phi \) by invoking a field potential. We use Statefinder hierarchy to distinguish the light mass Galileon models with different potentials amongst themselves and from the \(\Lambda \)CDM behaviour. The Om diagnostic is applied to cosmological dynamics and observational constraints on the model parameters are studied using SN + Hubble + BAO data.

Keywords

Dark energy theory Modified gravity Cosmological parameters Observations 

Notes

Acknowledgments

We thank M. Sami for his useful comments and suggestions. MS thanks to Sumit Kumar and M. W. Hossain for fruitful discussions.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of General and Theoretical PhysicsEurasian National UniversityAstanaKazakhstan
  2. 2.Center for Theoretical PhysicsJamia Millia IslamiaNew DelhiIndia

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