Department of Physics, University of Zagreb, Zagreb HR-41001, Croatia.
Phys Rev Lett. 2010 Jan 8;104(1):012001. doi: 10.1103/PhysRevLett.104.012001.
We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at Q2=0.22 and 0.63 GeV2. 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 approximately < 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.
我们已经测量了在 Q2=0.22 和 0.63 GeV2 处的弹性电子-质子和准弹性电子-氘核散射中的宇称破坏不对称性。它们对核子中奇异夸克对电流和核子轴向电流的贡献敏感。结果表明，在这些动量传递下，奇异夸克对电荷和磁核子形状因子的贡献约为 10%。我们还在这些动量传递下首次测量了轴向电流中的磁偶极子效应。
