Reconciliation of the Measurement of Parity-Nonconservation in Cs with the Standard Model

Preprint

3 August 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0005274

Abstract

Contributions from the Breit interaction in atomic-structure calculations account for 1.3sigma of the previously reported 2.5sigma deviation from the Standard Model in the 133Cs weak charge [S.C. Bennett and C.E. Wieman, Phys. Rev. Lett. 82, 2484 (1999)]. The updated corrections for the neutron distribution reduce the discrepancy further to 1.0sigma. The updated value of the weak charge is Q_W(133Cs) = -72.65(28)_{expt}(34)_{theor}. The present analysis is a higher-order extension of previous calculation [A. Derevianko, E-print physics/0001046].

Keywords

PARITY NONCONSERVATION
ATOMIC STRUCTURE
RECONCILIATION
STANDARD MODEL
WEAK CHARGE
NEUTRON
133CS

All Related Versions

Version 1, 2000-05-26, ArXiv
Version 2, 2000-08-03, ArXiv
Published version: Physical Review Letters, 85 (8), 1618.

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