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Nuclear transparency with the γnπp process in 4He

D. Dutta et al. ((Jefferson Lab E94104 Collaboration))
Phys. Rev. C 68, 021001(R) – Published 15 August 2003
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Abstract

We have measured the nuclear transparency of the fundamental process γnπp in 4He. These measurements were performed at Jefferson Lab in the photon energy range of 1.6–4.5 GeV and at θcmπ=70° and 90°. 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 that include the quantum chromodynamics phenomenon of color transparency.

  • Received 9 May 2003

DOI:https://doi.org/10.1103/PhysRevC.68.021001

©2003 American Physical Society

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Vol. 68, Iss. 2 — August 2003

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