Measurement of Parity Nonconservation and an Anapole Moment in Cesium

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(E1pnc)/b 5 21.5935(56) millivolts per centimeter and provides an improved test of the standard model at low energy, including a value for the S parameter of21.3(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.

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@inproceedings{Wood1997MeasurementOP, title={Measurement of Parity Nonconservation and an Anapole Moment in Cesium}, author={Carol Wood and Stephanie C Bennett and Doo-Hee Cho and Bartholomew Masterson and Jacob L. Roberts and Carol E. Tanner and Carl E. Wieman}, year={1997} }