Precision determination of weak charge of Cs133 from atomic parity violation

S. G. Porsev, K. Beloy, and A. Derevianko
Phys. Rev. D 82, 036008 – Published 30 August 2010

Abstract

We discuss results of the most accurate to-date test of the low-energy electroweak sector of the standard model of elementary particles. Combining previous measurements with our high-precision calculations we extracted the weak charge of the Cs133 nucleus, QW=73.16(29)exp(20)th [S. G. Porsev, K. Beloy, and A. Derevianko, Phys. Rev. Lett. 102, 181601 (2009)]. The result is in perfect agreement with QWSM predicted by the standard model, QWSM=73.16(3), and confirms energy dependence (or running) of the electroweak interaction and places constraints on a variety of new physics scenarios beyond the standard model. In particular, we increase the lower limit on the masses of extra Z-bosons predicted by models of grand unification and string theories. This paper provides additional details to the earlier paper. We discuss large-scale calculations in the framework of the coupled-cluster method, including full treatment of single, double, and valence triple excitations. To determine the accuracy of the calculations we computed energies, electric-dipole amplitudes, and hyperfine-structure constants. An extensive comparison with high-accuracy experimental data was carried out.

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  • Received 21 June 2010

DOI:https://doi.org/10.1103/PhysRevD.82.036008

© 2010 The American Physical Society

Authors & Affiliations

S. G. Porsev1,2,3, K. Beloy1,4, and A. Derevianko1

  • 1Physics Department, University of Nevada, Reno, Nevada 89557, USA
  • 2School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
  • 3Petersburg Nuclear Physics Institute, Gatchina, Leningrad District 188300, Russia
  • 4Centre for Theoretical Chemistry and Physics, The New Zealand Institute for Advanced Study, Massey University Auckland, Private Bag 102904, 0745, Auckland, New Zealand

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Vol. 82, Iss. 3 — 1 August 2010

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