  A remarkably successful program of parity-violating electron scattering
experiments is providing new insight into the structure of the nucleon.
Measurement of the vector form factors enables a definitive study of potential
strange quark-antiquark contributions to the electromagnetic structure such as
the magnetic moment and charge distribution. Recent experimental results have
already indicated that effects of strangeness are much smaller than
theoretically expected. In addition, the neutral axial form factor appears to
display substantial corrections as one might expect from an anapole effect.

High Energy Physics - Phenomenology