Analysis of Characteristics of Particles Produced in Soft and Hard Processes in Nucleus-Nucleus Collisions at Relativistic Energies

摘要

Average Kinematic Characteristics of π~-- mesons and protons in soft and hard processes are analyzed. Soft and hard processes are produced in (p, d, He, C) Ta collisions at 4.1AGeV/c and 10GeV/c. Experimental results in CTa - collisions at A.2AGeV/c are compared with predictions of the quark - gluon string model (QGSM) and DCM-Dubna version of the cascade - evaporation model. The conclusion is made that production of cumulative protons is caused by fluctuations of density of the heavy target nucleus Ta, but definite role is played by the mass and energy of the projectile. Characteristics of protons with maximal cumulative number n_c~(max) are studied. It is shown that they do not depend on the atomic number A_i of the projectile, on the atomic number A_t of the target, on the incident energy, but depend only on n_c~(max).