August 28, 2011 to September 2, 2011
US/Central timezone
Slides available on Indico -- there are no formal proceedings

Axion cosmology and domain walls

Aug 31, 2011, 2:00 PM
Room 103 Kersten Physics Teaching Center

Room 103 Kersten Physics Teaching Center


Mr Ken'ichi Saikawa (Institute for Cosmic Ray Research, The University of Tokyo)


We reargue the axion cosmology which suffers from the domain wall problem. Domain walls are formed after the QCD phase transition, but it may disappear if we introduce a bias in the potential. We perform lattice simulations of domain wall networks and estimate the decay rate of domain walls. Using the result of the numerical study, we give the observational constraints for model parameters. We also discuss the possibility to probe axion models by the direct detection of gravitational waves produced by domain walls.

Presentation materials