Parity-Violating Electron-Deuteron Scattering
Abstract
The longitudinal asymmetry due to Z^0 exchange is calculated in quasi-elastic electron-deuteron scattering at momentum transfers |Q^2| \simeq 0.1 GeV^2 relevant for the SAMPLE experiment. The deuteron and pn scattering-state wave functions are obtained from solutions of a Schr\"odinger equation with the Argonne v_{18} potential. Electromagnetic and weak neutral one- and two-nucleon currents are included in the calculation. The two-nucleon currents of pion range are shown to be identical to those derived in Chiral Perturbation Theory. The results indicate that two-body contributions to the asymmetry are small (\simeq 0.2%) around the quasi-elastic peak, but become relatively more significant (\simeq 3%) in the high-energy wing of the quasi-elastic peak.