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 , 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 language||English (US)|
|Journal||EPJ Web of Conferences|
|State||Published - Apr 12 2010|
|Event||19th International IUPAP Conference on Few-Body Problems in Physics, Few-Body 2009 - Bonn, Germany|
Duration: Aug 31 2009 → Sep 5 2009
ASJC Scopus subject areas
- Physics and Astronomy(all)