Measurement of Nuclear Transparency from A(e,e',π+) Reactions
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
We have measured the nuclear transparency of the A(e, e' π+) process in 2H,12C, 27Al, 63Cu and 197Au targets. These measurements were performed at the Jefferson Laboratory over a four momen- tum transfer squared range Q2 = 1.1 to 4.7 (GeV/c)2. The nuclear transparency was extracted as the super-ratio of ( σA/ σH) from data to a model of pion-electroproduction from nuclei without N final state interactions. The Q2 and atomic number dependence of the nuclear transparency both show deviations from traditional nuclear physics expectations, and are consistent with calculations that include the quantum chromodynamical phenomenon of color transparency.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- E01-107 Collaboration
- OSTI ID:
- 955631
- Report Number(s):
- JLAB-PHY--06-634; DOE/ER/40150--4417
- Country of Publication:
- United States
- Language:
- English
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