Universality of particle production and energy balance in hadronic and nuclear collisions

Abstract

The multihadron production in AA and pp/pp collisions is studied by exploring the collision-energy and centrality dependencies of the mean multiplicity in the existing data. The study is performed in the framework of the recently proposed effective-energy approach which combines the constituent quark picture and Landau hydrodynamics counting for the centrality-defined effective energy of participants. The multiplicity energy dependence and the pseudorapidity spectra from the most central nuclear collision data are well-reproduced. The study of the multiplicity centrality dependence reveals a new scaling between the measured pseudorapidity spectra and the calculations. Using this scaling, called the energy balanced limiting fragmentation scaling, the pseudorapidity spectra are wellreproduced for all centralities. A similarity in the multiplicity energy dependence in the most central collisions and centrality data is shown. Predictions are drawn for the mean multiplicities to be measured in hadronic and heavy-ion collisions at the LHC. © 2016, Jagellonian University. All rights reserved.