Speaker
Dr
Andreas Wirzba
(Forschungszentrum Jülich GmbH)
Description
A nonzero electric dipole moment (EDM) of the neutron, proton, deuteron
or helion, in fact, of any finite system necessarily involves the breaking of a symmetry,
either by the presence of external fields (i.e., electric fields leading to the case of
induced EDMs) or
explicitly by the breaking of the discrete parity and time-reflection symmetries in the
case of permanent EDMs.
Recent results for the relevant matrix elements
of nuclear EDM operators based on calculations in
chiral effective field theory ($\chi$EFT) are presented. Furthermore,
strategies are discussed for
disentangling the underlying sources of CP breaking beyond what
is generated by the Kobayashi--Maskawa quark-mixing mechanism in the Standard Model.
Author
Dr
Andreas Wirzba
(Forschungszentrum Jülich GmbH)
