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Precise calculation of parity nonconservation in cesium and test of the standard model

V. A. Dzuba·V. V. Flambaum·J. S. M. Ginges
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Abstract

We have calculated the 6s-7s parity nonconserving (PNC) E1 transition amplitude, E_{PNC}, in cesium. We have used an improved all-order technique in the calculation of the correlations and have included all significant contributions to E_{PNC}. Our final value E_{PNC} = 0.904 (1 +/- 0.5 %) \times 10^{-11}iea_{B}(-Q_{W}/N) has half the uncertainty claimed in old calculations used for the interpretation of Cs PNC experiments. The resulting nuclear weak charge Q_{W} for Cs deviates by about 2 standard deviations from the value predicted by the standard model.

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V. A. Dzuba, V. V. Flambaum, J. S. M. Ginges. 2002-04-12. Precise calculation of parity nonconservation in cesium and test of the standard model. https://doi.org/10.1103/physrevd.66.076013

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