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HK: Fachverband Hadronen und Kerne

HK 55: Heavy Ion Collisions and QCD phases

HK 55.6: Vortrag

Mittwoch, 18. März 2009, 18:15–18:30, H-ZO 10

Bridging Low and High Energy Processes:From Hadron-Nuclei to Relativistic Ions Collisions — •Sergey Eliseev — Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation

A new model (a la Glauber) for hadron–nuclei interaction at intermediate energy is proposed. The main theoretical assumptions such as in the approaches of others authors describing J/Psi suppression in nuclear collisions and color transparency of nuclei at high energy is used. Yet, a number of new ingredients in the model: noneikonal corrections, correlations of nucleons in the nuclei is introduced, etc. The nuclear Fermi motion effect was taken into account. The relevant momentum distributions of the nucleons was taken from different models. To examine the nuclear interior, the K⁺-meson (at intermediate energy, IE) is regarded as a unique probe due to its long mean free-path in the nuclear matter. A detailed analysis of the cross sections of K⁺ - nuclei interactions at IE is presented. Our model improve the agreement between theory of others authors and data for the K⁺ - nuclei scattering, but remain the "window" for some "exotics". The nature of that "exotics" (mass reduction, or "swelling" (etc.) will be discussed. In the conclusion, it is important to note that: 1. Our results have been obtained without fitting any new parameters. 2. The discrepancy between calculations and data on K⁺ - nuclei scattering my be regarded as one of more probable signal of new physics in nuclear collisions. (It is just the contrary what was obtained for J/Psi suppression and color transparency.)