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Title Elastic Scattering of Longitudinally Polarized Electrons from 4^He
Abstract We have performed the first measurement of the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons from ^4He. The kinematics chosen (Q^2 = 0.1 (GeV/c)^2) provide a direct sensitivity to the strange electric form factor G^s_E with negligible contributions from competing effects. This experiment was performed in June 2004 and July-September 2005 in Hall A at Jefferson Lab. This work represents the experimental setup and analysis of the 2004 dataset. The final statistical precision, from the combined datasets, put stringent requirements on the systematic errors that normalize the asymmetry (e.g. Q^2, beam polarization, backgrounds). The experimental and analysis techniques, presented in this thesis, resulted in a 12.9% relative measure of the parity-violating asymmetry for the 2004 dataset, and a 4.1% relative measure for the 2005 dataset (the most precise measurement of a parity-violating asymmetry ever obtained). The 2004 measured result, A^{
Author(s) Bryan Moffit
Publication Date May 2007
Document Type Thesis
Primary Institution The College of William and Mary, Williamsburg, VA
Affiliation Exp Nuclear Physics / Experimental Halls / Hall A
Funding Source
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-07-796 OSTI Number:
LANL Number: Other Number: DOE/OR/23177-0298
Associated with an experiment Yes
Experiment Number(s)
E00-114
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Thesis
Thesis Type PhD
Advisor Institution
1. David S. Armstrong College of William and Mary
Attachments/Datasets/DOI Link
Document(s)
Moffit_Thesis.pdf (STI Document)
Dataset(s) (none)
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