Online Archive of University of Virginia Scholarship
Extraction of GnE Q2 =1 - from Measurements of - 3He(e, e)498 views
Author
Jin, Ge, Department of Physics, University of Virginia
Advisors
Norum, Blaine, Department of Physics, University of Virginia
Liyanage, Nilanga, Department of Physics, University of Virginia
Paschke, Kent, Department of Physics, University of Virginia
Liuti, Simonetta, Department of Physics, University of Virginia
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
Degree
MA (Master of Arts)
Language
English
Rights
All rights reserved (no additional license for public reuse)
Jin, Ge. Extraction of G<sup>n</sup><sub>E</sub> Q<sup>2</sup> =1 - from Measurements of - <sup>3</sup>He(e, e). University of Virginia, Department of Physics, MA (Master of Arts), 2011-05-01, https://doi.org/10.18130/V3Q105.
