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

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.

24 pages, 8 figures

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• Measurement of the 6s - 7p transition probabilities in atomic cesium and a revised value for the weak charge Q_W
• High-precision determination of transition amplitudes of principal transitions in Cs from van der Waals coefficient C_6
• Parity nonconservation in heavy atoms: The radiative correction enhanced by the strong electric field of the nucleus

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