Annihilation of antiprotons on nuclear targets at low energies: a simple analysis
A. Bianconi, G. Bonomi, E. Lodi Rizzini, L. Venturelli, A. Zenoni
Abstract
We set up a plane wave impulse approximation (PWIA) formalism for the analysis of the annihilation cross sections of antinucleons on nuclear targets at very low momenta (below 100 MeV/c), where semiclassical approximations can't be applied. Since, as we test here, PWIA fails in reproducing the unexpected ``inversion'' behavior of the pp and p-nucleus annihilation cross sections found in a recent experimentobe1,obe2 we discuss some further possibilities, with a special attention to the optical potential model.
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