Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment
- Androic, D.
- Armstrong, D.S.
- Arvieux, J.
- L. Bailey, S.
- H. Beck, D.
- Beise, E.J.
- Benesch, J.
- Benmokhtar, F.
- Bimbot, L.
- Birchall, J.
- Bosted, P.
- Breuer, H.
- L. Capuano, C.
- Chao, Y.-C.
- Coppens, A.
- Davis, C.A.
- Ellis, C.
- Flores, G.
- Franklin, G.
- Furget, C.
- Gaskell, D.
- Gericke, M.T.W.
- Grames, J.
- Guillard, G.
- Hansknecht, J.
- Horn, T.
- Jones, M.,
- King, P.M.
- Korsch, W.
- Kox, S.
- Lee, L.
- Liu, J.
- Lung, A.
- Mammei, J.
- Martin, J.W.
- McKeown, R.D.
- Mihovilovic, M.
- Micherdzinska, A.
- Mkrtchyan, H.
- Muether, M.
- Page, S.A.
- Papavassiliou, V.
- Pate, S.F.
- Phillips, S.K.
- Pillot, Philippe
- Pitt, M.L.
- Poelker, M.
- Quinn, B.
- Ramsay, W.D.
- Real, J.S.
- Roche, J.
- Roos, P.
- Schaub, J.
- Seva, T.
- Simicevic, N.
- Smith, G.R.
- Spayde, D.T.
- Stutzman, M.
- Suleiman, R.
- Tadevosyan, V.
- Van Oers, W.T.H.
- Versteegen, M.
- Voutier, E.
- Vulcan, W.
- Wells, S.P.
- Williamson, S.E.
- Wood, S.A.
Publication date
January 2010
DOI Publisher
American Physical Society (APS)Abstract
5 pages, 2 figuresWe 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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