QCD motivated approach to soft interactions at high energies: nucleus-nucleus and hadron-nucleus collisions

摘要

In this paper we consider nucleus-nucleus and hadron-nucleus reactions in thekinematic region: $g A^{1/3} G_{3\pom} \exp\Lb \Delta Y\Rb \approx 1 G^2_{3\pom} \exp\Lb \Delta Y\Rb \approx 1 $, where $G_{3\pom}$ is the triplePomeron coupling, $g$ is the vertex of Pomeron nucleon interaction, and 1 +$\Delta_{\pom}$ denotes the Pomeron intercept. We find that in this kinematicregion the traditional Glauber-Gribov eikonal approach is inadequate. We showthat it is necesssary to take into account inelastic Glauber corrections, whichcan not be expressed in terms of the nucleon-nucleon scattering amplitudes. Inthe wide range of energies where $\alpha'_\pom Y \ll R^2_A$,the scattering amplitude for the nucleus-nucleus interaction, doesnot depend on the details of the nucleon-nucleon interaction at high energy. Inthe formalism we present, the only (correlated) parameters that are required todescribe the data are $\Delta_{\pom}$, $G_{3\pom}$ and $g$. These parameterswere taken from our description of the nucleon-nucleon data at high energies\cite{GLMM}.The predicted nucleus modification factor is compared with RHICAu-Au data at $W = 200 GeV.$ Estimates for LHC energies are presented anddiscusssed.