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

• # Fulltext

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

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

• # Pramana – Journal of Physics

Volume 97, 2023
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019