Nuclear suppression of hadroproduction

Abstract

We demonstrate that the main part of the observed nuclear suppression of dilepton and charmonium production, especially the x dependence of the suppression, can be explained by the absorption of fast initial partons. We describe several reactions at different energies using one empirical form of the parton absorption cross section. The factorization theorem constraints and some alternative models are discussed. The obtained description of data suggests that the parton recombination and the excess pion contribution are unimportant in nuclei. A gluon excess in nuclei at xϳ0.1 is compatible with the present model.

A Microscopic Optical Potential for Deuteron

“…of the deuteron reaction cross section for 40 Ca with the experimental data (symbols). [10] The radial dependence of the MOP for deuteron scattering from 40 Ca at incident energies of 10, 30, 50, 70, 90 and 110 MeV is shown in Fig. 1.…”

“…The deuteron reaction cross section for 40 Ca is calculated with the MOP, and the comparison of the calculated result with the experimental data [10] is given in Fig. 2.…”

“…Fig.2. Comparison of the calculated result (solid line) of the deuteron reaction cross section for 40 Ca with the experimental data (symbols) [10]. …”