5 papers
Ultra-slow-roll Inflation with Non-perturbative Non-Gaussianity and Scalar Induced Gravitational Waves
Manuel Drees, Chenhuan Wang
An ultra-slow-roll phase during inflation could potentially produce the right abundance of primordial black holes (PBHs) for them to form all of dark matter (DM). We consider such…
Refined Predictions for Starobinsky Inflation and Post-inflationary Constraints in Light of ACT
Manuel Drees, Yong Xu
Recent measurements from the Atacama Cosmology Telescope (ACT), combined with Planck and DESI data, suggest a higher value for the spectral index . This places Starobinsky inf…
Inflection Point Inflation in Supergravity
Manuel Drees, Wenbin Zhao
In this paper, we study the inflection point inflation generated by a polynomial superpotential and a canonical Kähler potential under the supergravity framework, where only one ch…
Inflaton Self Resonance, Oscillons, and Gravitational Waves in Small Field Polynomial Inflation
Manuel Drees, Chenhuan Wang
In this work, we investigate the post-inflationary dynamics of a simple single-field model with a renormalizable inflaton potential featuring a near-inflection point at a field val…
Parameter Space of Leptogenesis in Polynomial Inflation
Manuel Drees, Yong Xu
Polynomial inflation is a very simple and well motivated scenario. A potential with a concave ``almost'' saddle point at field value fits well the cosmic microwave backgro…