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, $\chi$ of the T,P-odd interactions ${\chi }_e\mathbf{N}\cdot \mathbf{s}/s$ and ${\chi }_N\mathbf{N}\cdot \mathbf{I}/I$ are also estimated for the TlF, HgF and YbF molecules (where $\mathbf{s}$ ($\mathbf{I}$) is the electron (nuclear) spin and $\mathbf{N}$ 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.

Comments: Uses RevTex, 16 pages, 4 postscript figures. An explanation of why there is no orbital contribution to the EDM has been added, and the presentation has been improved in general