Zero-motion correlations in high-energy proton elastic scattering on40Ca with noneikonal nucleon-nucleon amplitude

Abstract

Using a noneikonal expression for the two-body scattering amplitude, consistent with the proton-nucleon scattering data, the cross-section of the 1.04 GeV-proton elastic scattering on 4~ is calculated by the GlauberSitenko theoretical scheme in the framework of the coherent density fluctuation model (CDFM) as well as of the independent-particle model (IPM). It is shown that the use of the noneikonal amplitude in the CDFM calculations improves the agreement with the experimental data especially at larger scattering angles in contrast to the case of the independent-particle model. To that end a decisive role play the zero-motion flucton correlations taken into account in the CDFM.

PROTON-NUCLEUS ELASTIC SCATTERING AT ~1 GeV AND THE NN AMPLITUDE

“…However, once we accept that the Glauber formalism is a reliable theoretical tool at intermediate energies, it seems important to focus our attention on its basic ingredients. In this context, it may be mentioned that Antonov et al, 8 and Khan and Singh 9 have shown that a better description of the NN amplitude improves the theoretical situation throughout the range of momentum transfer, as compared to the generally used single Gaussian approximation for the NN amplitude. 10 This clearly indicates the importance of a proper choice of the NN amplitude in any realistic study of the proton-nucleus scattering data.…”