Androić, D. and Armstrong, D. S. and Arvieux, J. and Bailey, S. L. and Beck, D. H. and Beise, E. J. and Benesch, J. and Benmokhtar, F. and Bimbot, L. and Birchall, J. and Bosted, P. and Breuer, H. and Capuano, C. L. and Chao, Y.-C. and Coppens, A. and Davis, C. A. and Ellis, C. and Flores, G. and Franklin, G. and Furget, C. and Gaskell, D. and Gericke, M. T. W. and Grames, J. and Guillard, G. and Hansknecht, J. and Horn, T. and Jones, M. and King, P. M. and Korsch, W. and Kox, S. and Lee, L. and Liu, J. and Lung, A. and Mammei, J. and Martin, J. W. and McKeown, R. D. and Mihovilovic, M. and Micherdzinska, A. and Mkrtchyan, H. and Muether, M. and Page, S. A. and Papavassiliou, V. and Pate, S. F. and Phillips, S. K. and Pillot, P. and Pitt, M. L. and Poelker, M. and Quinn, B. and Ramsay, W. D. and Real, J.-S. and Roche, J. and Roos, P. and Schaub, J. and Seva, T. and Simicevic, N. and Smith, G. R. and Spayde, D. T. and Stutzman, M. and Suleiman, R. and Tadevosyan, V. and van Oers, W. T. H. and Versteegen, M. and Voutier, E. and Vulcan, W. and Wells, S. P. and Williamson, S. E. and Wood, S. A. (2010) Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment. Physical Review Letters, 104 (1). 012001. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20100218-101354807
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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 ≲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 current at these four-momentum transfers.
|Additional Information:||© 2010 American Physical Society. Received 29 September 2009; published 8 January 2010. We gratefully acknowledge the strong technical contributions to this experiment from many groups: Caltech, Illinois, LPSC-Grenoble, IPN-Orsay, TRIUMF, and particularly the Accelerator and Hall C groups at Jefferson Lab. CNRS (France), DOE (U.S.), NSERC (Canada), and NSF (U.S.) supported this work in part.|
|Classification Code:||PACS: 13.60.-r, 11.30.Er, 14.20.Dh, 25.30.Bf|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||19 Feb 2010 17:45|
|Last Modified:||26 Dec 2012 11:46|
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