We report a calculation of the parity nonconserving (PNC) $E1$ amplitude for the 6p1/2→6p3/2 transition in ²⁰⁵Tl. Our result for the reduced matrix element is (E1)PNC=-(66.7±1.7)×i10^-11(-QW/N) a.u. Comparison with the experiment of Vetter et al. [Phys. Rev. Lett. 74, 2658 (1995)] gives the following result for the weak charge of ²⁰⁵Tl: QW/QWSM=0.97(±0.01)ₑₓₚₜ(±0.03)ₜₕₑₒᵣ, where QWSM=-116.7±0.1 is the standard-model prediction. This result confirms an earlier conclusion based on the analysis of a Cs experiment that atomic PNC experiments are in agreement with the standard model.
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Kozlov et al. (2001) studied this question.
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