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Lowering the self-coupling of the scalar field in the generalized Higgs inflation

  • Kourosh Nozari
  • Somayeh Shafizadeh
  • Narges Rashidi
Original Article

Abstract

We study cosmological dynamics of a generalized Higgs inflation. By expanding the action up to the second and third order in the small perturbations, we study the primordial perturbation and its non-Gaussian distribution. We study the non-Gaussian feature in both the equilateral and orthogonal configurations. By adopting a quartic potential, we perform a numerical analysis on the model’s parameter space and compare the results with Planck2015 observational data. To obtain some observational constraint, we focus on the self-coupling and the non-minimal coupling parameters. We show that, in the presence of the non-minimal coupling and the Galileon-like interaction, the self-coupling parameter can be reduced to the order of \(10^{-6}\) which is much larger than the value that CMB normalization suggests for this self-coupling.

Keywords

Generalized Higgs inflation Cosmological perturbations Non-Gaussianity Observational constraints 

Notes

Acknowledgements

The work of K. Nozari has been supported financially by Research Institute for Astronomy and Astrophysics of Maragha (RIAAM) under research project number 1/4717-71.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physics, Faculty of Basic SciencesUniversity of MazandaranBabolsarIran
  2. 2.Research Institute for Astronomy and Astrophysics of Maragha (RIAAM)MaraghaIran
  3. 3.Department of PhysicsPayame Noor University (PNU)TehranIran

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