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Extraction of G<Sup>N</Sup>≪Sub>E</Sub> Q<Sup>2</Sup> =1 - From Measurements of - ≪Sup>3</Sup>He(e, e)

Jin, Ge
Format
Thesis/Dissertation; Online
Author
Jin, Ge
Advisor
Norum, Blaine
Paschke, Kent
Liyanage, Nilanga
Liuti, Simonetta
Abstract
The neutron electric form factor, G<sup>n</sup><sub>E</sub>, is extracted for the first time at Q<sup>2</sup> = 1 (GeV/c)<sup>2</sup> from polarized <sup>3</sup>(He)\vec−→ e ,e ′ ) measurements in Hall A at Jefferson Lab. By getting the ratio of asymmetries in longitudinal and transverse quasi-elastic 3−→ He( −→ e ,e ′ ), the electric and magnetic contributions can be seperated. The proton and neutron contributions to the <sup>3</sup>H<i>e</i> quasi-elastic response functions are calculated in PWIA by Salme' <i>et al</i>., and the neutron electric form factor can be extracted. This method of inclusive scattering becomes feasible for the first time due to the falloff of the other form factors at high Q<sup>2</sup> while G<sup>n</sup><sub>E</sub> keeps increasing in units of the dipole form factor. Approximately 20% uncertainty is achieved in the extraction largely contributed by the statistical uncertainties from 3 days of data-taking. All aspects of the measurement will be discussed in this thesis including theoretical model, experiment setup and the details in the analysis. Note: Abstract extracted from PDF text
Language
English
Published
University of Virginia, Department of Physics, MA, 2011
Published Date
2011-05-01
Degree
MA
Collection
Libra ETD Repository
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