Speaker
Dr
Carlos Tamarit
(Technische Universität München)
Description
High-scale axion models are sensitive to CMB isocurvature bounds, which are thought to rule out scenarios with an axion decay constant fA above 10^14 GeV. This would be incompatible with grand unification scenarios featuring an axion with fA related to the unification scale, which could otherwise be primary targets for future experiments like CASPER and ABRACADABRA. In view of the above, we re-examine the cosmological history of axion perturbations during inflation and reheating in high-scale axion models in which the axion is mostly aligned with the phase of the field which drives inflation.
Primary authors
Andreas Ringwald
(DESY)
Dr
Carlos Tamarit
(Technische Universität München)
Dr
Guillermo Ballesteros
(IFT Madrid)
Dr
Yvette Welling
(DESY)
