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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, 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 momentum transfers. They also suggest a reduction in the magnitude of the effective axial form factor compared with that measured in neutrino scattering.
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http://hal.in2p3.fr/in2p3-00421168
Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, October 1, 2009 - 8:57:34 AM
Last modification on : Wednesday, September 16, 2020 - 4:07:53 PM

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D. Androic, D.S. Armstrong, J. Arvieux, S. L. Bailey, D. H. Beck, et al.. Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment. Physical Review Letters, American Physical Society, 2010, 104, pp.012001. ⟨10.1103/PhysRevLett.104.012001⟩. ⟨in2p3-00421168⟩

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