Work

Weyl-invariant Einstein–Cartan gravity with a heavy ALP: Higgs inflation and α-attractors

Year: 2026

Type: article

Abstract: We initiate the analysis of the inflationary dynamics in Weyl-invariant Einstein-Cartan gravity nonminimally coupled to the Standard Model of particle physics. We take the axion-like particle of gravitational origin to be heavy and show that inflation with the Higgs field can be accommodated in this framework.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2026.140151

Authors: Georgios K. Karananas, Mikhail Shaposhnikov, Sebastian Zell

Institutions: Ludwig-Maximilians-Universität München, École Polytechnique Fédérale de Lausanne, Max Planck Institute for Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Generalitat Valenciana, European Research Council

Awards: G316151611, G6059185683