19th International Iupap Conference on Few-Body Problems in Physics
We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electron-deuteron scattering at backward electron angle. These measurements have been done at two momentum transfers : Q(2) = 0.22 and 0.63 (GeV/c)(2). Together with our previous forward angle measurement , 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 Q(2), and a possible non zero strange quark electric contribution for the high Q(2). The first Q(2) behavior measurement of the nucleon axial form factor in elastic electron scattering shows a good agreement with radiative corrections calculated at Q(2) = 0 and with a dipole form using the axial mass determined in neutrino scattering.
Androic, D.; Seva, T.; Armstrong, D. S.; Bailey, S. L.; Capuano, C. L.; Phillips, S. K.; and Arvieux, J., Recent results from the G(0) experiment (2009). 19th International Iupap Conference on Few-Body Problems in Physics, 3.