Measurement of Parity Nonconservation and an Anapole Moment in Cesium-Reference-Cited by-同舟云学术

Measurement of Parity Nonconservation and an Anapole Moment in Cesium

Published:1997-03-21 Issue:5307 Volume:275 Page:1759-1763
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Wood C. S.¹,Bennett S. C.¹,Cho D.¹,Masterson B. P.¹,Roberts J. L.¹,Tanner C. E.¹,Wieman C. E.¹

Affiliation:

1. The authors are with JILA and the Department of Physics, University of Colorado, Boulder, CO 80309, USA.

Abstract

The amplitude of the parity-nonconserving transition between the 6 S and 7 S 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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