Toward Higgs inflation in the MSSM

TL;DR

This paper explores a supergravity inflation model where MSSM Higgs-like fields act as inflatons, resulting in unique fractional power potentials that can be tested by upcoming cosmological observations.

Contribution

It introduces a novel single-superfield supergravity framework for Higgs inflation with distinctive fractional power potentials, expanding the landscape of inflationary models.

Findings

Potential has fractional power form different from original Higgs inflation

Identifies challenges in directly associating MSSM Higgses with the inflaton

Proposes alternative inflaton candidates within the framework

Abstract

Adopting a recently proposed single-superfield framework of supergravity inflation, we consider large field inflationary models in which MSSM Higgs-like fields play the role of the inflaton. In the simplest cases, the inflaton potential has a fractional power, which is different from that of the original Higgs inflation, and it can be tested by cosmological observations in near future. We find difficulties in identifying the inflaton with the MSSM Higgses and discuss possible candidates of the inflaton.