Experimental Status of Parity Violating Electron Scattering
Abstract
Recently, there has been considerable theoretical interest in determining strange quark contributions to hadronic matrix elements. Such matrix elements can be accessed through the nucleon's neutral weak form factors as determined in parity violating electron scattering. A program of experiments is presently underway or planned at the MIT-Bates, Mainz and Jefferson Laboratories. The SAMPLE experiment at MIT-Bates will measure the strange magnetic form factor GMs at low momentum transfer. Two data taking periods have recently been completed, representing about 15% of the desired data on hydrogen. A summary of recent progress on the SAMPLE experiment is presented, along with future plans at Jefferson Lab.
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