9 citations · 9 across the 4 of their papers we have counts for
4 papers
Spectator Axions in String Inflation and Primordial Black Holes
Michele Cicoli, Dario L. Lorenzoni, Evan McDonough +1
We study the impact of light spectator axions on the seeding of primordial black holes (PBHs) during inflation in string theory. Primordial black holes exhibit unique and novel phe…
Primordial Black Holes from Inflation with a Spectator Field
Dario L. Lorenzoni, Sarah R. Geller, David I. Kaiser +1
How is the production of primordial black holes (PBHs) in single-field models of inflation impacted by the presence of additional scalar fields? We consider the effect of a spectat…
Resilience of Primordial Black Hole Formation from Inflation with a Light Spectator Field
Dario L. Lorenzoni, Sarah R. Geller, Zachary Ireland +3
Scalar fields are ubiquitous in theories of high-energy physics. In the context of cosmic inflation, this suggests the existence of spectator fields, which provide a subdominant so…
Natural Inflation with Exponentially Small Tensor-To-Scalar Ratio
Dario L. Lorenzoni, David I. Kaiser, Evan McDonough
We demonstrate that "natural inflation", also known as "axion inflation", can be compatible with Planck 2018 measurements of the cosmic microwave background, while predicting an ex…