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

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Abstract

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
JournalScience
Volume275
Issue number5307
DOIs
Publication statusPublished - 1997 Mar 21

ASJC Scopus subject areas

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    Wood, C. S., Bennett, S. C., Cho, D., Masterson, B. P., Roberts, J. L., Tanner, C. E., & Wieman, C. E. (1997). Measurement of parity nonconservation and an anapole moment in cesium. Science, 275(5307), 1759-1763. https://doi.org/10.1126/science.275.5307.1759