## Revisiting Parity Nonconservation in Cesium

V. A. Dzuba, J. C. Berengut, V. V. Flambaum, B. M. Roberts, Phys. Rev. Lett. 109, 203003 (2012)

doi:10.1103/PhysRevLett.109.203003

arXiv:1207.5864

We apply the sum-over-states approach to calculate partial contributions to the parity non-conservation (PNC) in cesium [Porsev et al, Phys. Rev. D 82, 036008 (2010)]. We have found significant corrections to two non-dominating terms coming from the contribution of the core and highly excited states (n>9, the so called tail). When these differences are taken into account the result of Porsev et al, $$E_{\rm PNC} = 0.8906\,(24) \times 10^{-11}i(-Q_W/N)$$ changes to $$0.8977\,(40)$$, coming into good agreement with our previous calculations, $$0.8980\,(45)$$. The interpretation of the PNC measurements in cesium still indicates reasonable agreement with the standard model ($$1.5\,\sigma$$), however gives new constraints on physics beyond it.

Written on 13 November 2012