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Calculation of parity nonconservation in cesium and possible deviation from 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 E1 transition amplitude (E_{PNC}) in cesium. This calculation has been performed with higher numerical accuracy than our 1989 calculation [V.A. Dzuba, V.V. Flambaum, and O.P. Sushkov, Phys. Lett. A {\bf 141}, 147]. Also the Breit interaction has been included and the radiative corrections estimated. Our final result is E_{PNC}=0.902 (1 +/- 0.7%)iea_{B}(Q_{W}/N). This represents an improvement in the accuracy of the calculation from the 1% error claimed in 1989. This result corresponds to a nuclear weak charge for Cs, Q_{W}=-72.39 (1 +/- 0.4% (exp) +/- 0.7% (theory)). We conclude that there is no significant deviation from the Standard Model value -73.09(3).

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V. A. Dzuba, V. V. Flambaum, J. S. M. Ginges. 2001-11-02. Calculation of parity nonconservation in cesium and possible deviation from the Standard Model. https://arxiv.org/abs/hep-ph/0111019

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