Observational constraints on inflationary models with non-minimally derivative coupling by ACT
General Relativity and Quantum Cosmology
2025-09-03 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
The most recent data release from the Atacama Cosmology Telescope (ACT) reveals a larger value of the scalar spectral tilt , ruling out a broad class of inflationary attractors. In this paper, we consider inflationary models including the power law potential, the hilltop model, the polynomial -attractor and exponential attractor, with non-minimally derivative coupling in the high friction limit, and show how the models can fit ACT data. We also derive constraints on the model parameters using the latest ACT data.
Keywords
Cite
@article{arxiv.2506.18456,
title = {Observational constraints on inflationary models with non-minimally derivative coupling by ACT},
author = {Qing Gao and Yanjiang Qian and Yungui Gong and Zhu Yi},
journal= {arXiv preprint arXiv:2506.18456},
year = {2025}
}
Comments
1 figure, minor changes to match the version published on JCAP