Higgs inflation in Weyl-invariant Einstein-Cartan gravity

TL;DR

This paper explores how Higgs inflation can occur within Weyl-invariant Einstein-Cartan gravity, considering an axion-like particle of gravitational origin, and demonstrates the inflationary dynamics in this framework.

Contribution

It introduces a novel analysis of Higgs inflation in Weyl-invariant Einstein-Cartan gravity coupled with the Standard Model, highlighting the role of a gravitational axion-like particle.

Findings

Inflation can be realized with the Higgs field in this framework.

The gravitational axion-like particle remains approximately massless during inflation.

The model provides a consistent inflationary scenario within Weyl-invariant Einstein-Cartan gravity.

Abstract

In this short note we analyze the inflationary dynamics in Weyl-invariant Einstein-Cartan gravity coupled to the Standard Model of particle physics. We take the axion-like particle of gravitational origin to be approximately massless in the early Universe and show how inflation with the Higgs field materializes.