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Phys. Rev. Lett. 94, 232502 (2005) [4 pages]

Nuclear Time-Reversal Violation and the Schiff Moment of 225Ra

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J. Dobaczewski*
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, USA
Joint Institute for Heavy-Ion Research, Oak Ridge, Tennessee 37831, USA
Institute of Theoretical Physics, Warsaw University, ulica Hoża 69, 00-681 Warsaw, Poland

J. Engel†
Department of Physics and Astronomy, CB3255, University of North Carolina, Chapel Hill, North Carolina 27599-3255, USA

Received 22 March 2005; published 13 June 2005

We present a comprehensive mean-field calculation of the Schiff moment of the nucleus 225Ra, the quantity that determines the static electric-dipole moment of the corresponding atom if time-reversal (T) invariance is violated in the nucleus. The calculation breaks all possible intrinsic symmetries of the nuclear mean field and includes, in particular, both exchange and direct terms from the full finite-range T-violating nucleon-nucleon interaction, and the effects of short-range correlations. The resulting Schiff moment, which depends on three unknown T-violating pion-nucleon coupling constants, is much larger than in 199Hg, the isotope with the best current experimental limit on its atomic electric-dipole moment.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.232502
DOI:
10.1103/PhysRevLett.94.232502
PACS:
24.80.+y, 11.30.Er, 21.60.Jz, 27.90.+b

*Electronic address: Jacek.Dobaczewski@fuw.edu.pl

†Electronic address: engelj@physics.unc.edu.

 
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