The analysis of π~- mesons produced in nucleus-nucleus collisions at a momentum of 4.5 GeV/c nucleon in light front variables

摘要

The light front analysis of π~- mesons in He(Li, C), C-Ne, C-Cu and O-Pb collisions is carried out. The phase space of secondary pions is divided into two parts in one of which the thermal equilibrium assumption seems to be in a ggod agreement with the data. Corresponding temperatures T are extracted and their dependence on (A_p * A_T)~(1/2) is studied. The results are compared with the predictions of the Quark-Gluon String Model (QGSM). The QGSM satisfactorily reproduces the experimental data for light and intermediate-mass nuclei.