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

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Date

2010-01-08

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Publisher

American Physical Society

Abstract

We have measured parity-violating asymmetries in elastic electron-proton and quasielastic 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 the nucleon axial-vector current. The results indicate strange quark contributions of less than or similar to 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-vector cur-rent at these four-momentum transfers.

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Keywords

neutral-current, form-factors, nucleon, proton, Physics

Citation

Androic, D. ; Armstrong, D. S. ; Arvieux, J. ; et al., Jan 8, 2010. “Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment,” PHYSICAL REVIEW LETTERS 104(1): 012001. DOI: 10.1103/PhysRevLett.104.012001