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 language | English |
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Pages (from-to) | 1759-1763 |
Number of pages | 5 |
Journal | Science |
Volume | 275 |
Issue number | 5307 |
DOIs | |
Publication status | Published - 1997 Mar 21 |
ASJC Scopus subject areas
- General