From the 1 of 5 linked papers with an AI index.
5 papers
The Too Visible QCD Axion
Luca Di Luzio, Michele Redi, Alessandro Strumia +2
The paper examines a GeV‑scale QCD axion model where the up‑quark mass arises from the QCD chiral condensate, identifies a structural problem that breaks isospin symmetry and disto…
Particle Production from Inhomogeneities: the off-shell side of gravitational waves
Michele Redi, Andrea Tesi
We continue the study of particle production from gravitational inhomogeneities in the early Universe. Focusing on sources active on sub-horizon scales, we derive general expressio…
Mimicking Phantom Dark Energy with Evolving Dark Matter Mass
Lorenzo La Penna, Alessio Notari, Michele Redi
We present a general method to reproduce a given cosmological background through energy exchange between dark energy (DE) and dark matter (DM). This can be simply realized with a s…
Particle production from inhomogeneities: general metric perturbations
Raghuveer Garani, Michele Redi, Andrea Tesi
We present universal formulas for particle production from gravitational inhomogeneities. In the massless limit the result is strikingly simple and completely determined by the two…
Reconstructing the Inflaton Potential: Primordial Black Holes and Gravitational Waves in Slow Roll and Ultra Slow Roll Single Field Inflation
Gabriele Autieri, Michele Redi
We present new single field inflationary scenarios that produce the critical abundance of primordial black holes as dark matter reconstructing the inflaton potential from an input…