QCD Axion mass - dark matter density relation

by Guy Moore (Darmstadt)

Thursday 11 May 2017, 14:00 → 15:00 Europe/Berlin

3344 (Physikdepartment)

The hypothetical QCD axion would explain why the strong interactions obey time-reversal symmetry, and it could also make up the Dark Matter of the Universe. I argue that, within reasonable assumptions, it should be possible to predict the axion's mass if it makes up all of dark matter. I show why making this prediction is difficult in practice, and how to overcome these difficulties. I predict an axion mass of 23 +- 4 micro-electron volts.