Photoabsorption on nuclei in the shadowing threshold region

Abstract

The energy and nuclear mass dependences of the total hadronic cross section in the energy range 0.5-2.6 GeV have been measured at Bonn using the SAPHIR tagged photon beam. The measurement, performed on C, Al, Cu, Sn and Pb, provides the first photoabsorption data in the region 1.2-1.7 GeV. The results show a significant reduction of the photoabsorption strength on the bound nucleon compared to the free nucleon case in the whole energy region. Above 1.2 GeV this reduction decreases with the nuclear density and can be interpreted as a signature of a low energy onset of the shadowing effect.

arXiv comment10 pages, 11 figures

References in corpus (4)

• The Spectral Function of the Rho Meson in Nuclear Matter
• A new evaluation of the Baldin sum rule
• A Microscopic Calculation of Photoabsorption Cross Sections on Protons and Nuclei
• Phenomenology of Nuclear Shadowing in Deep-Inelastic Scattering

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