Work

Modular invariant slow roll inflation

Year: 2024

Type: article

Abstract: We propose new classes of inflation models based on the modular symmetry, where the modulus field τ serves as the inflaton. We establish a connection between modular inflation and modular stabilization, wherein the modulus field rolls towards a fixed point along the boundary of the fundamental domain. We find the modular symmetry strongly constrain the possible shape of the potential and identify some parameter space where the inflation predictions agree with cosmic microwave background observations. The tensor-to-scalar ratio is predicted to be smaller than 10 -6 in our models, while the running of spectral index is of the order of 10 -4 .

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2024/10/016

Authors: Gui-Jun Ding, Si-Yi Jiang, Wenbin Zhao

Institutions: University of Science and Technology of China, University of Bonn

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: G6452356485, G6685297604