Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.203003
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- Australian Research Council
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We apply the sum-over-states approach to calculate partial contributions to parity nonconservation (PNC) in cesium [Porsev, Beloy, and Drevianko, Phys. Rev. Lett. 102, 181601 (2009)]. We find significant corrections to two nondominating 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-PNC = 0.8906(24) x 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, it gives new constraints on physics beyond it.
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