Impact of Atomic Parity Violation Measurements on Precision Electroweak Physics

Abstract

The impact of atomic parity violation experiments on determination of the weak mixing parameter ${\sin }^2\theta$ and the Peskin-Takeuchi parameters $S$ and $T$ is reassessed in the light of recent electroweak measurements at LEP, SLAC, and Fermilab. Since the weak charge $Q_W$ provides unique information on $S$, its determination with a factor of four better accuracy than present levels can have a noticeable effect on global fits. However, the measurement of $\Delta Q_W/Q_W$ for two different isotopes provides primarily information on ${\sin }^2\theta$. To specify this quantity to an accuracy of $\pm 0.0004$, comparable to that now provided by other electroweak experiments, one would have to determine $\Delta Q_W/Q_W$ in cesium to about 0.1\% of its value, with comparable demands for other nuclei. The relative merits of absolute measurements of $Q_W$ and isotope ratios for discovering effects of new gauge bosons are noted briefly.

11 pages, latex, 1 uuencoded figure sent separately

References in corpus (8)

• Observation of Top Quark Production in Pbar-P Collisions
• Observation of the Top Quark
• Hadronic contributions to $(g-2)$ of the leptons and to the effective fine structure constant $\alpha (M_Z^2)$
• A determination of the QED coupling at the $Z$ pole
• Measurement of the W Boson Mass
• A Measurement of the W Boson Mass
• The heavy top quark in the two Higgs doublet model
• A Precise Measurement of the Weak Mixing Angle in Neutrino-Nucleon Scattering

Cited by in corpus (10)

• Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles
• The Weak Neutral Current
• Role of Present and Future Atomic Parity Violation Experiments in Precision Electroweak Tests
• Atomic Parity Violation and Precision Electroweak Physics - An Updated Analysis
• Parity-Violating Excitation of the Δ(1232): Hadron Structure and New Physics
• Prospects for Parity Non-conservation Experiments with Highly Charged Heavy Ions
• Reevaluation of the role of nuclear uncertainties in experiments on atomic parity violation with isotopic chains
• Stark quenching for the $1s^{2}2s2p^3{P}_0$ level in beryllium-like ions and parity-violating effects
• Super-heavy Quarkonia and the Gluon Condensate
• Estimate of Contribution from P-D Mixing in Atomic PNC