High Energy Measurements of the Deuteron Photodisintegration Differential Cross Section
Schulte, Elaine Carol
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https://hdl.handle.net/2142/31384
Description
Title
High Energy Measurements of the Deuteron Photodisintegration Differential Cross Section
Author(s)
Schulte, Elaine Carol
Issue Date
2002
Doctoral Committee Chair(s)
Holt, R.J.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
deutron photodisintegration
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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