1994/02/07 by S. Thomas, Scott Thomas · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.51.3955
published as Phys.Rev. D51 (1995) 3955-3957 · 7 pages, 1 figure (not included), Tex file, requires phyzzx, preprint SCIPP 93/45
arxiv created 1994/02/07 · openalex publication_date 1995/04/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Schiff moment operator \ensuremathψ\mathrm\ifmmode\else\textasciimacron\fii\ensuremath∂\ensuremath→_\mathrm\ensuremathμ\ensuremathγ5\mathrm\ensuremathψi\ensuremathψ\mathrm\ifmmode\else\textasciimacron\fij\ensuremathγ^\mathrm\ensuremathμ\mathrm\ensuremathψj is a parity- and time-reversal-violating fermion-fermion coupling. The nucleus-electron Schiff moment generally gives the most important contribution to the electric dipole moments of atoms and molecules with zero net intrinsic electronic spin and nuclear spin 1/2. Here, the electromagnetic contribution to the Schiff moment \ensuremathψ\mathrm\ifmmode\else\textasciimacron\fii\ensuremath∂\ensuremath→_\ensuremathν\ensuremathγ5\mathrm\ensuremathψi\mathrm\ensuremath∂_\mathrm\ensuremathμF^\mathrm\ensuremathμ\ensuremathν is considered. For a nucleon, the leading nonanalytic contribution to this interaction is calculable in the chiral limit in terms of the parity- and time-reversal-violating pion-nucleon coupling. For the Schiff moment of heavy nuclei, this chiral contribution is somewhat smaller than the finite size effect discussed previously in the literature.