SN0402 : Remarks on the Geometry of High Energy Nuclear Collisions

Author(s):P. Jacobs and G. Cooper
Date:Jun. 24, 1999
Abstract:We discuss several aspects of the geometry of nuclear collisions relevant to STAR and RHIC, within the framework of the familiar Glauber formalism. An analytical rule is derived for the scaling of hard process rates with system size in the absence of nuclear effects, and baseline predictions are made for single inclusive pion rates at high pt. The initial shape of the interaction region for noncentral collisions is discussed for several simple interaction models, and moments of these distributions projected into the transverse plane are calculated. The number of nucleon participants and binary collisions for these models is also calculated. The radial distribution of hard scatterings relative to the center of the colliding nuclei is presented.