Measurement of Nuclear Transparency for the A(e,e' pi^+) Reaction

Abstract

We have measured the nuclear transparency of the A(e,e' pi^+) process in ^{2}H,^{12}C, ^{27}Al, ^{63}Cu and ^{197}Au targets. These measurements were performed at the Jefferson Laboratory over a four momentum transfer squared range Q^2 = 1.1 - 4.7 (GeV/c)^2. The nuclear transparency was extracted as the super-ratio of $({\sigma }_A/{\sigma }_H)$ from data to a model of pion-electroproduction from nuclei without pi-N final state interactions. The Q^2 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.

5 pages, 3 figs Changes to figure 2 and 3 (error band updated and theory curves updated)

References in corpus (1)

• Nuclear transparencies from photoinduced pion production

Cited by in corpus (7)

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• A new calculation for D(e,e'p)n at GeV energies
• Color transparency and short-range correlations in exclusive pion photo- and electroproduction from nuclei
• Color Transparency in Semi-Inclusive Electroproduction of rho Mesons
• Hadrons in Nuclei -- from High (200 GeV) to Low (1 GeV) energies
• High-energy hadron physics at future facilities