Recent results from the G0 experiment

J. S. Real, D. Androić, D. S. Armstrong, J. Arvieux, S. L. Bailey, D. H. Beck, E. J. Beise, J. Benesch, F. Benmokhtar, L. Bimbot, J. Birchall, P. Bosted, H. Breuer, C. L. Capuano, Y. C. Chao, A. Coppens, C. A. Davis, C. Ellis, G. Flores, G. FranklinC. Furget, D. Gaskell, M. T.W. Gericke, J. Grames, G. Guillard, J. Hansknecht, T. Horn, M. Jones, P. M. King, W. Korsch, S. Kox, L. Lee, J. Liu, A. Lung, J. Mammei, J. W. Martin, R. D. McKeown, A. Micherdzinska, M. Mihovilovic, H. Mkrtchyan, M. Muether, W. T.H. Van Oers, S. A. Page, V. Papavassiliou, S. F. Pate, S. K. Phillips, P. Pillot, M. L. Pitt, M. Poelker, B. Quinn, W. D. Ramsay, J. Roche, P. Roos, J. Schaub, T. Seva, N. Simicevic, G. R. Smith, D. T. Spayde, M. Stutzman, R. Suleiman, V. Tadevosyan, M. Versteegen, E. Voutier, W. Vulcan, S. P. Wells, S. E. Williamson, S. A. Wood

Research output: Contribution to journalConference articlepeer-review

Abstract

We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electrondeuteron scattering at backward electron angle. These measurements have been done at two momentum transfers: Q2 = 0.22 and 0.63 (GeV/c)2. Together with our previous forward angle measurement [1], we can extract strange quark contributions to the electromagnetic form factors of the nucleon, as well as nucleon axial form factor coming from the neutral weak interaction. The results indicate a strange quark magnetic contribution close to zero at these Q2, and a possible non zero strange quark electric contribution for the high Q2. The first Q2 behavior measurement of the nucleon axial form factor in elastic electron scattering shows a good agreement with radiative corrections calculated at Q2 = 0 and with a dipole form using the axial mass determined in neutrino scattering.

Original languageEnglish (US)
Article number03004
JournalEPJ Web of Conferences
Volume3
DOIs
StatePublished - Apr 12 2010
Event19th International IUPAP Conference on Few-Body Problems in Physics, Few-Body 2009 - Bonn, Germany
Duration: Aug 31 2009Sep 5 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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