• Ringing non-Gaussianity from inflation with a step in the second derivative of the potential

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    • Keywords


      Inflation; 3-point function; non-Gaussianity.

    • Abstract


      Inflationary model driven by a scalar field whose potential has a step in the second derivative with respect to the field is considered. For the best-fit potential parameter values, the 3-point function and the non-Gaussianity associated with the featured model is calculated. We study the shape and scale dependence of the 3-point function. The distinctive feature of this model is its characteristic ringing behaviour of f$_{NL}$. We can see that the oscillationsin f$_{NL}$ in this model last for a much longer range of k values, than the previously studied models. In that sense, this model is potentially distinguishable from models with other features in the potential.

    • Author Affiliations



      1. Department of Physics, NSS College, Pandalam 689 501, India
      2. Department of Physics, Alphonsa College, Pala 686 574, India
    • Dates

  • Pramana – Journal of Physics | News

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