6 citations · 9 across the 6 of their papers we have counts for
6 papers
Pure Natural Inflation Passes the ACT
Cristóbal Zenteno Gatica, Alexandros Papageorgiou, Matteo Fasiello
Pure natural inflation is a compelling effectively single-field model of inflation stemming from a top-down approach to the acceleration mechanism. In this short letter we show tha…
Primordial Gravitational Waves from Scalar Backreaction in Axion-SU(2) Inflation
Mattia Cielo, Ema Dimastrogiovanni, Matteo Fasiello +1
In this work, we perform the first numerical study of strong scalar backreaction in spectator chromo-natural inflation (SCNI) in the case where the spectator sector decays during i…
Kinetic Fragmentation of the QCD Axion on the Lattice
Matteo Fasiello, Joanes Lizarraga, Alexandros Papageorgiou +1
Kinetic misalignment, one of the most compelling scenarios for the non-thermal generation of axion dark matter, is generally accompanied by axion fragmentation, a process in which…
On the prospects of thermalization of axion-SU(2) inflation
Sukannya Bhattacharya, Matteo Fasiello, Alexandros Papageorgiou +1
Axion inflation models coupled to a gauge sector via a Chern-Simons term exhibit an array of interesting phenomenology including a chiral gravitational wave spectrum and primordial…
Pure Chromo-Natural Inflation: Signatures of Particle Production from Weak to Strong Backreaction
Ema Dimastrogiovanni, Matteo Fasiello, Alexandros Papageorgiou +1
We consider, in the context of axion-inflation, the \textit{Pure Natural Inflation} (PNI) model coupled with an SU(2) gauge sector via a Chern-Simons term. As the axion rolls down…
Memory of a Random Walk: Astrometric deflections from gravitational wave memory accumulation over cosmological scales
Tore Boybeyi, Vuk Mandic, Alexandros Papageorgiou
We study the impact of gravitational wave memory on the distribution of far away light sources in the sky. For the first time we compute the built up of small, but permanent tensor…