Speaker
Riccardo Natale
(DESY)
Description
Axion Kinetic Misalignment can be generated by higher-order operators that explicitly break the PQ symmetry at very high energies. This results in a kick in the angular direction of the PQ field, causing a delay in the onset of axion oscillations. For the higher-order operator to be relevant, the PQ radial mode must reach very high values. We explore the possibility that a non-minimally coupled PQ field, with a $\xi R|\Phi|^2$ term, combined with a stiff era, can generate the exact initial conditions for a Kinetic Misalignment Mechanism.
Primary authors
Riccardo Natale
(DESY)
Enrico Morgante
(U. Trieste & INFN)
