Speaker
Mr
Martino Michelotti
(Van Swinderen Institute for Particle Physics and Gravity, University of Groningen)
Description
In this talk we discuss, as recently proposed in arXiv:2303.10718 [astro-ph.CO], how chromo-natural inflation (CNI) can be made compatible with observations at CMB scales through the introduction of a non-minimal coupling of the axion-inflaton kinetic term with the Einstein tensor. The resulting gravitationally-enhanced friction allows the gauge friction to be reduced just enough to avoid the overproduction of chiral GWs at CMB scales, while this compelling feature (characteristic of the CNI model) is delayed at much higher frequencies, where the signal may even be detectable by next-generation interferometers.
Primary authors
Dr
Ema Dimastrogiovanni
Dr
Matteo Fasiello
Mr
Martino Michelotti
(Van Swinderen Institute for Particle Physics and Gravity, University of Groningen)
Dr
Lucas Pinol
