The pseudorapidity distributions of the produced charged particles in p-p collisions at center-of-mass energies from 23.6 to 900 GeV

In p-p collisions, there are two leading particles. One is in projectile fragmentation region. The other is in target fragmentation region. The investigations of present paper show that, just like in nucleus-nucleus collisions, the revised Landau hydrodynamic model alone is not enough to have a good description to the measured pseudorapidity distributions of the produced charged particles in p-p collisions. Only after the leading particles are taken into account as well, can the experimental data be matched up properly. The theoretical model works well in p-p collisions in the whole available energy region from sqrt(s_NN) =23.6 to 900 GeV.

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