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High-accuracy calculation of 6s --> 7s parity-nonconserving amplitude in Cs
M G Kozlov1, S G Porsev, I I Tupitsyn
1Petersburg Nuclear Physics Institute, Gatchina, 188300 Russia.
Physical Review Letters
|May 1, 2001
Abstract:
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 beta are found to be -0.4% and -1%, respectively. The weak charge of 133Cs is Q(W) = -72.5+/-0.7 in agreement with the standard model.