High Energy Measurements of the Dueteron Photodisintegration Differential Cross Section
Schulte, Elaine Carol
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https://hdl.handle.net/2142/31376
Description
Title
High Energy Measurements of the Dueteron Photodisintegration Differential Cross Section
Author(s)
Schulte, Elaine Carol
Issue Date
2002-01
Director of Research (if dissertation) or Advisor (if thesis)
Holt, R.J.
Doctoral Committee Chair(s)
Beck, Douglas H.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
deutron photodisintegration
high energy measurements
Thomas Jefferson National Accelerator Facility
Language
en
Abstract
New measurements of the high energy deutron photodisintegration differential cross section were made at the Thomas Jefferson National Accelerator Facility in Newport News, Virginia. Two experiments were performed. Experiment E96-003 was performed in experimental Hall C. The measurements were designed to extend the highest energy differential cross section values to 5.5 GeV incident photon energy at forward angles. This builds upon previous high energy measurements in which scaling consistent with the pQCD constituent counting rules was observed at 90° and 70° in the center of mass. From the new measurements, a threshold for the onset of constituent counting rule scaling seems present at transverse momentum approximately 1.3 GeV/c. The second experiment, E99_008, was performed in experimental Hall A. The measurements were designed to explore the angular distribution of the differential cross section at constant energy. The measurements were made symmetric about 90° in the center of mass. The results, which are neither consistent with meson exchange nor quark-exchange, remain puzzling.
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