Supercurvaton

TL;DR

This paper explores the observational implications of the supergravity-based curvaton scenario, highlighting its potential for producing significant non-gaussianity and a complex web-like structure of regions with varying f_NL values.

Contribution

It introduces the supercurvaton model within supergravity, analyzing its potential to generate observable non-gaussianity and a distinctive web-like spatial structure.

Findings

f_NL can range from O(10) to O(100)

Regions with large f_NL form a web of topological defects

The model links inflationary physics with observable non-gaussianity

Abstract

We discuss observational consequences of the curvaton scenario, which naturally appears in the context of the simplest model of chaotic inflation in supergravity. The non-gaussianity parameter f_NL in this scenario can take values in the observationally interesting range from O(10) to O(100). These values may be different in different parts of the universe. The regions where f_NL is particularly large form a curvaton web resembling a net of thick domain walls, strings, or global monopoles.