3260 High - Accuracy Calculation of 6 s ! 7 s Parity - Nonconserving Amplitude in Cs
نویسندگان
چکیده
I. I. Tupitsyn Institute of Physics, St. Petersburg State University, Uljanovskaya 1, Petrodvorets, 198504 St. Petersburg, Russia (Received 9 January 2001) We calculated the parity-nonconserving (PNC) 6s ! 7s amplitude in Cs. In the Dirac-Coulomb approximation our result is in good agreement with other calculations. Breit corrections to the PNC amplitude and to the Stark-induced amplitude b are found to be 20.4% and 21%, respectively. The weak charge of 133Cs is QW 272.5 6 0.7 in agreement with the standard model.
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