QED Corrections to the Parity-Nonconserving 6s-7s Amplitude in 133Cs
Abstract
The complete gauge-invariant set of the one-loop QED corrections to the parity-nonconserving 6s-7s amplitude in 133Cs is evaluated to all orders in αZ using a local version of the Dirac-Hartree-Fock potential. The calculations are performed in both length and velocity gauges for the absorbed photon. The total binding QED correction is found to be -0.27(3)%. The weak charge of 133Cs, derived using two most accurate values of the vector transition polarizability β, is QW=-72.57(46) for β=26.957(51)a3B and QW=-73.09(54) for β=27.15(11)a3B. The first value deviates by 1.1σ from the prediction of the standard model, while the second one is in perfect agreement with it.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2005
- DOI:
- 10.1103/PhysRevLett.94.213002
- arXiv:
- arXiv:physics/0501165
- Bibcode:
- 2005PhRvL..94u3002S
- Keywords:
-
- 31.30.Jv;
- 11.30.Er;
- 32.80.Ys;
- Relativistic and quantum electrodynamic effects in atoms and molecules;
- Charge conjugation parity time reversal and other discrete symmetries;
- Weak-interaction effects in atoms;
- Physics - Atomic Physics;
- Physics - General Physics
- E-Print:
- 4 pages, 1 figure, 2 tables