Radiative and correlation effects on the parity-nonconserving transition amplitude in heavy alkali-metal atoms

Journal Article · Thu Dec 15 04:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786256

Shabaev, V M ^[1]; Tupitsyn, I I ^[1]; Pachucki, K ^[2]; Plunien, G ^[3]; Yerokhin, V A ^[1]

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1. Department of Physics, St. Petersburg State University, Oulianovskaya 1, Petrodvorets, St. Petersburg 198504 (Russian Federation)
2. Institute of Theoretical Physics, Warsaw University, Hoza 69, 00-681 Warsaw (Poland)
3. Institut fuer Theoretische Physik, TU Dresden, Mommsenstrasse 13, D-01062 Dresden (Germany)

The complete gauge-invariant set of the one-loop QED corrections to the parity-nonconserving (PNC) amplitude in cesium and francium is evaluated to all orders in {alpha}Z using a local form of the Dirac-Fock potential. The calculations are performed in both length and velocity gauges for the absorbed photon and the total binding QED correction is found to be -0.27(3)% for Cs and -0.28(5)% for Fr. Moreover, a high-precision calculation of the electron-correlation and Breit-interaction effects on the 7s-8s PNC amplitude in francium using a large-scale configuration-interaction Dirac-Fock method is performed. The obtained results are employed to improve the theoretical predictions for the PNC transition amplitude in Cs and Fr. Using an average value from two most accurate measurements of the vector transition polarizability, the weak charge of {sup 133}Cs is derived to amount to Q{sub W}=-72.65(29){sub exp}(36){sub theor}. This value deviates by 1.1{sigma} from the prediction of the standard model. The values of the 7s-8s PNC amplitude in {sup 223}Fr and {sup 210}Fr are obtained to be -15.49(15) and -14.16(14), respectively, in units of ix10{sup -11}(-Q{sub W})/N a.u.

• OSTI ID: 20786256
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CESIUM
CESIUM 133
CONFIGURATION INTERACTION
ELECTRON CORRELATION
FRANCIUM
FRANCIUM 210
FRANCIUM 223
GAUGE INVARIANCE
HARTREE-FOCK METHOD
P INVARIANCE
PARITY
PHOTONS
POLARIZABILITY
POTENTIALS
QUANTUM ELECTRODYNAMICS
RADIATIVE CORRECTIONS
STANDARD MODEL
TRANSITION AMPLITUDES
WEAK INTERACTIONS