On primordial trispectrum from exchanging scalar modes in general multiple field inflationary models

TL;DR

This paper derives the complete leading-order primordial trispectrum resulting from scalar exchanges in generalized multi-field inflation models, expanding understanding of early universe fluctuations.

Contribution

It provides the full leading-order trispectrum calculation in generalized multi-field inflation, complementing previous irreducible contribution analyses.

Findings

Derived the full leading-order primordial trispectrum for multi-field models.

Enhanced understanding of scalar exchange contributions in inflationary non-Gaussianity.

Complements prior work on irreducible trispectrum components.

Abstract

We make an complementary investigation of the primordial trispectrum from exchanging intermediate scalar modes in multi-field inflation models with generalized kinetic terms. Together with the calculation of irreducible contributions to the primordial trispectrum in Ref.[103], we give the full leading-order primordial trispectrum in generalized multi-field models.