Measurement of parity nonconservation and an anapole moment in cesium

C. S. Wood, S. C. Bennett, D. Cho, B. P. Masterson, J. L. Roberts, C. E. Tanner, C. E. Wieman

Research output: Contribution to journalArticlepeer-review

1021 Citations (Scopus)


The amplitude of the parity-nonconserving transition between the 6S and 7S states of cesium was precisely measured with the use of a spin-polarized atomic beam. This measurement gives Im(E1(pnc))/β = - 1.5935(56) millivolts per centimeter and provides an improved test of the standard model at low energy, including a value for the S parameter of - 1.3(3)(exp) (11)(theory). The nuclear spin- dependent contribution was 0.077(11) millivolts per centimeter; this contribution is a manifestation of parity violation in atomic nuclei and is a measurement of the long-sought anapole moment.

Original languageEnglish
Pages (from-to)1759-1763
Number of pages5
Issue number5307
Publication statusPublished - 1997 Mar 21

ASJC Scopus subject areas

  • General


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