Nuclear Transparency with the gamma + n -> pi- + p Process in 4He
Journal Article
·
· Physical Review C
OSTI ID:834998
We have measured the nuclear transparency of the fundamental process {gamma} n {yields} {pi}{sup -} p in {sup 4}He. These measurements were performed at Jefferson Lab in the photon energy range of 1.6 to 4.5 GeV and at {theta}{sub cm}{sup {pi}} = 70{sup o} and 90{sup o}. These measurements are the first of their kind in the study of nuclear transparency in photoreactions. They also provide a benchmark test of Glauber calculations based on traditional models of nuclear physics. The transparency results suggest deviations from the traditional nuclear physics picture. The momentum transfer dependence of the measured nuclear transparency is consistent with Glauber calculations which include the quantum chromodynamics phenomenon of color transparency.
- 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:
- 834998
- Report Number(s):
- JLAB-PHY-03-63; DOE/ER/40150-3029; nucl-ex/0305005
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Vol. 68
- Country of Publication:
- United States
- Language:
- English
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