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

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      https://www.ias.ac.in/article/fulltext/pram/096/0056

    • 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

       

      R RAKHI1 MINU JOY2

      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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      Posted on July 25, 2019

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