Precise calculation of parity nonconservation in cesium and test of the standard model
V. A. Dzuba, V. V. Flambaum, J. S. M. Ginges
Abstract
We have calculated the 6s-7s parity nonconserving (PNC) E1 transition amplitude, EPNC, in cesium. We have used an improved all-order technique in the calculation of the correlations and have included all significant contributions to EPNC. Our final value EPNC = 0.904 (1 +/- 0.5 %) × 10-11ieaB(-QW/N) has half the uncertainty claimed in old calculations used for the interpretation of Cs PNC experiments. The resulting nuclear weak charge QW for Cs deviates by about 2 standard deviations from the value predicted by the standard model.
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