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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    1049 Citations (Scopus)

    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

    • General

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