The weak neutral current of the nucleonDouglas H. Beck
Nuclear Physics Laboratory and Loomis Laboratory of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801, USA
(Received 03 October 2004 / Published online 08 February 2005)
Experiment and theory related to the neutral weak current of the nucleon is briefly reviewed. Completed measurements include those of the SAMPLE (MIT-Bates), HAPPEX (JLab) and PVA4 (Mainz) experiments. The future plans for the latter two experiments and those for the G0 experiment (JLab) are also discussed. The review includes discussion of the physics associated with the contributions of different quark flavors to the nucleon vector currents, as well as that associated with the axial vector currents.
PACS: 13.60.-r Photon and charged-lepton interactions with hadrons - 14.20.Dh Protons and neutrons - 25.30.-c Elastic electron scattering - 11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries - 12.15.Lk Electroweak radiative corrections
© Società Italiana di Fisica, Springer-Verlag 2005