Calculation of parity nonconservation in cesium and possible deviation from the Standard Model

Details Calculation of parity nonconservation in cesium and possible deviation from the Standard Model Calculation of parity nonconservation in cesium and possible deviation from the Standard Model

2001-11-02

arxiv.org/abs/hep-ph/0111019v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 10 figures

Scientific paper

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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