The SAMPLE Experiment and Weak Nucleon Structure

Details The SAMPLE Experiment and Weak Nucleon Structure The SAMPLE Experiment and Weak Nucleon Structure

2004-12-22

arxiv.org/abs/nucl-ex/0412054v1

Prog.Part.Nucl.Phys. 54 (2005) 289-350

Physics

Nuclear Physics

Nuclear Experiment

61 pages, review article

Scientific paper

10.1016/j.ppnp.2004.07.002

One of the key elements to understanding the structure of the nucleon is the role of its quark-antiquark sea in its ground state properties such as charge, mass, magnetism and spin. In the last decade, parity-violating electron scattering has emerged as an important tool in this area, because of its ability to isolate the contribution of strange quark-antiquark pairs to the nucleon's charge and magnetism. The SAMPLE experiment at the MIT-Bates Laboratory, which has been focused on s-sbar contributions to the proton's magnetic moment, was the first of such experiments and its program has recently been completed. In this paper we give an overview of some of the experimental aspects of parity-violating electron scattering, briefly review the theoretical predictions for strange quark form factors, summarize the SAMPLE measurements, and place them in context with the program of experiments being carried out at other electron scattering facilities such as Jefferson Laboratory and the Mainz Microtron.

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