Limits on the monopole magnetic field from measurements of the electric dipole moments of atoms, molecules and the neutron
Abstract
A radial magnetic field can induce a time invariance violating electric dipole moment (EDM) in quantum systems. The EDMs of the Tl, Cs, Xe and Hg atoms and the neutron that are produced by such a field are estimated. The contributions of such a field to the constants,
χ
of the T,P-odd interactions
χ
e
N⋅s/s
and
χ
N
N⋅I/I
are also estimated for the TlF, HgF and YbF molecules (where
s
(
I
) is the electron (nuclear) spin and
N
is the molecular axis). The best limit on the contact monopole field can be obtained from the measured value of the Tl EDM. The possibility of such a field being produced from polarization of the vacuum of electrically charged magnetic monopoles (dyons) by a Coulomb field is discussed, as well as the limit on these dyons. An alternative mechanism involves chromomagnetic and chromoelectric fields in QCD.