Limit on the nuclear Schiff moment of europium-153
Abstract
The Schiff moment of a nucleus is a symmetry-violating nuclear moment that indicates new physics beyond the Standard Model. We place the limit, |S(153Eu)| < 1.7 × 10-8 e\,fm3 (95\% confidence), on the Schiff moment of the 153Eu nucleus, using nuclear spin resonances in two ensembles of oppositely-polarized 153Eu3+ ions in a Y2SiO5 crystal. This measurement using octupolar nuclei in a mm-scale crystal constrains new physics at the TeV energy-scale.
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