Date of Award

Spring 2013

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Physics

Committee Director

Sebastian Kuhn

Committee Member

J. Wallace Van Orden

Committee Member

Stephen Bueltmann

Committee Member

Desmond Cook

Committee Member

D. Glenn Lasseigne

Abstract

Using the CLAS detector at Jefferson Lab, double spin asymmetries (A ∥) for quasi-elastic electron scattering off the deuteron have been measured at several beam energies. The data were collected during the EG1 experiment, which scattered longitudinally polarized electrons with energies from 1.6 to 5.8 GeV off a longitudinally polarized cryogenic ND3 target. The double spin asymmetries were measured as a function of photon virtuality Q2 (0.13-3.17 (GeV/c)2), missing momentum (0.0-0.5 GeV/c), and the angle between the (inferred) "spectator" neutron and the momentum transfer direction (θng). The results from EG1b are compared with a recent model that includes final state interactions using a complete parameterization of nucleon-nucleon scattering as well as a simplified model using the plane wave impulse approximation. From this comparison, it is concluded that the inclusion of final-state interactions are needed at high missing momenta, while the PWIA description works rather well at lower missing momenta. The asymmetry changes sign as a function of the missing momentum, as expected within PWIA from the presence of a D-state component in the deuteron wavefunction.

DOI

10.25777/h0b1-ac24

ISBN

9781303166235

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