Centrality dependence of the thermal excitation-energy deposition in 8–15 GeV/chadron-Au reactions
R. A. Soltz,Robert Newby,J. L. Klay,M. Heffner,Luc Beaulieu,T. Lefort,K. Kwiatkowski,V. E. Viola;R. A. Soltz;Robert Newby;J. L. Klay;M. Heffner;Luc Beaulieu;T. Lefort;K. Kwiatkowski;V. E. Viola;
physical review c2009Vol. 79pp. 034607-
176
viola2009physicalcentrality
Abstract
The excitation energy per residue nucleon (E*/A) and fast and thermal light particle multiplicities are studied as a function of centrality defined as the number of grey tracks emitted Ngrey and by the mean number of primary hadron-nucleon scatterings (〈ν〉) and the mean impact parameter (〈b〉) extracted from it. The value of E*/A and the multiplicities show an increase with centrality for all systems, 14.6 GeV p-Au and 8.0 GeV π-Au and p¯-Au collisions, and the excitation energy per residue nucleon exhibits a uniform dependence on Ngrey.