Kavli Affiliate: Hitoshi Murayama | First 5 Authors: Dan Kondo, Dan Kondo, , , | Summary: Many models of dark matter QCD axion requires inflation at a scale $H_textinf lesssim 10^6$~GeV and hence does not allow for a detectable tensor mode fluctuation. This is because the domain wall problem forces the Peccei–Quinn symmetry to be […]
Continue.. Multiple Axions Save High-Scale Inflation