Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment

Abstract

We have measured parity-violating asymmetries in elastic electron-proton and quasi-elastic electron-deuteron scattering at Q^2 = 0.22 and 0.63 GeV^2. They are sensitive to strange quark contributions to currents in the nucleon, and to the nucleon axial current. The results indicate strange quark contributions of < 10% of the charge and magnetic nucleon form factors at these four-momentum transfers. We also present the first measurement of anapole moment effects in the axial current at these four-momentum transfers.

5 pages, 2 figures, changed references, typo, and content

References in corpus (23)

• Axial structure of the nucleon
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• Strange Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton Scattering Experiment
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• Precise determination of the strangeness magnetic moment of the nucleon
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• Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron
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• Nucleon Charge Symmetry Breaking and Parity Violating Electron-Proton Scattering
• Strange magnetic form factor of the proton at $Q^2=0.23$ GeV${}^2$
• The Nucleon Anapole Form Factor in Chiral Perturbation Theory to Sub-leading Order
• Detailed analysis of two-boson exchange in parity-violating e-p scattering
• The Cryogenic Target for the G${}^0$ Experiment at Jefferson Lab
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