Using a hadron and string cascade model JPCIAE we have investigated the dependence of event-by-event charge fluctuations on ͑pseudo͒rapidity window size, final state interaction, resonance decay, centrality, and reaction energy for PbϩPb collisions at SPS and LHC energies and for AuϩAu collisions at RHIC energies. The JPCIAE results of the charge fluctuations as a function of rapidity window size in PbϩPb collisions at SPS energies are compared with the preliminary NA49 data. Comparisons with PHENIX and STAR data in AuϩAu collisions at ͱs nn ϭ130 GeV are also given. It is found that the charge fluctuations hardly depend on collision centrality except for very peripheral collisions and are rather insensitive to the change of reaction energy. Our calculations also show that the charge fluctuations are not strongly affected by the final state interaction and the resonance decay.
The distributions of dynamic variables in the deep inelastic scattering (DIS) of heavy-ions are studied by a direct simulation technique based on the single-nucleon-transfer-mechanism. The relative motion of the two collision partners is described by a Lagrange equation, and the transition probability of a single nucleon during the interaction time is calculated by the statistical spectroscopy method. The occurrence of the transition event and the corresponding change of the dynamic variables are both treated randomly according to the transition probability. The calculated results for the reaction of 40Ar+58Ni(EL=280MeV) are compared with experimental data.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.