High Energy Two-Body Deuteron Photodisintegration
- Univ. of Illinois, Urbana-Champaign, IL (United States)
The differential cross section for two-body deuteron photodisintegration was measured at photon energies between 0.8 and 4.0 GeV and centerofmass angles θcm =37°, 53°, 70°, and 90° as part of CEBAF experiment E89012. Constituent counting rules predict a scaling of this cross section at asymptotic energies. In previous experiments this scaling has surprisingly been observed at energies between 1.4 and 2.8 GeV at 90°. The results from this experiment are in reasonable agreement with previous measurements at lower energies. The data at 70° and 90° show a constituent counting rule behavior up to 4.0 GeV photon energy. The 37° and 53°g data do not agree with the constituent counting rule prediction. The new data are compared with a variety of theoretical models inspired by quantum chromodynamics (QCD) and traditional hadronic nuclear physics.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 1023438
- Report Number(s):
- JLAB-PHY-99-85; DOE/ER/40150-4955
- Country of Publication:
- United States
- Language:
- English
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