Nuclear time-reversal violation and the Schiff moment of 225Ra

Details Nuclear time-reversal violation and the Schiff moment of 225Ra Nuclear time-reversal violation and the Schiff moment of 225Ra

2005-03-22

arxiv.org/abs/nucl-th/0503057v2

Phys.Rev.Lett. 94 (2005) 232502

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures; this version (references added) to be published in PRL

Scientific paper

10.1103/PhysRevLett.94.232502

We present a comprehensive mean-field calculation of the Schiff moment of the nucleus 225Ra, the quantity which 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.

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