Thursday, March 17, 2022, 16:00
online only
(for the zoom link contact michael.spira@psi.ch, johannes.schlenk@psi.ch or
antonio.coutinho@psi.ch)
Andreas Ringwald, DESY Hamburg
Abstract:
There are a number of past, ongoing, or proposed experiments sensitive
to oscillating nucleon electric dipole moments (NEDMs) induced by
ultralight dark matter comprised by pseudo-scalar pseudo-Nambu-Goldstone
bosons. We show that, in a sizeable part of the parameter space spanned
by the coupling to the NEDM and the mass, these pseudo-Nambu-Goldstone
bosons can be identified with proper QCD axions, that is in this region
they may also solve the strong CP problem. This parameter space is
within tantalizing reach of the experimental projects for the next
decades.