Photopion Production at Higher Energies
Conference
·
OSTI ID:841734
Photopion production from a nucleon target is a fundamental process that is essential for studies of high-energy photoreactions in nuclei and for the study of quark models in the high energy regime. The approved JLAB experiment E94-104 uses a 6 GeV beam to investigate the constituent quark counting rule for the gamma n --> pi{sup -} p differential cross section. This measurement can be extended to 8 GeV as JLAB energies are upgraded. Quark model predictions for the momentum dependence of the ratio of pi{sup -} to pi{sup +} photoproduction from the nucleon make their relative cross-section an important observable to investigate at high energies. Not only will it provide a decisive test of pion photoproduction models, but it is an excellent means of investigating the transition from a description based on nucleon-meson degrees of freedom to a QCD-based description in terms of quark-gluon degrees of freedom.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 841734
- Report Number(s):
- JLAB-PHY-98-63; DOE/ER/40150-3498
- Country of Publication:
- United States
- Language:
- English
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