Measurement of the 6S7S Transition Polarizability in Atomic Cesium and an Improved Test of the Standard Model

S. C. Bennett and C. E. Wieman
Phys. Rev. Lett. 82, 2484 – Published 22 March 1999; Errata Phys. Rev. Lett. 82, 4153 (1999); Phys. Rev. Lett. 83, 889 (1999)
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The ratio of the off-diagonal hyperfine amplitude to the tensor transition polarizability (Mhf/β) for the 6S7S transition in cesium has been measured. The value of β=27.024(43)expt(67)theora03 is then obtained using an accurate semiempirical value of Mhf. This is combined with a previous measurement of parity nonconservation in atomic cesium and previous atomic structure calculations to determine the value of the weak charge. The uncertainties in the atomic structure calculations are updated (and reduced) in light of new experimental tests. The result QW=72.06(28)expt(34)theor differs from the prediction of the standard model of elementary particle physics by 2.5 σ.

  • Received 20 October 1998


©1999 American Physical Society


Authors & Affiliations

S. C. Bennett and C. E. Wieman

  • JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309
  • and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440

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Vol. 82, Iss. 12 — 22 March 1999

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