A description of pseudorapidity distributions in p-p collisions at   center-of-mass energy from 23.6 to 900 GeV
  In the context of combined model of evolution-dominated hydrodynamics + leading particles, we discuss the pseudorapidity distributions of charged particles produced in p-p collisions. A comparison is made between the theoretical predictions and experimental measurements. The combined model works well in p-p collisions in the whole available energy region from sqrt(s_NN)=23.6 to 900 GeV. 
Zhi-Jin Jiang, Jie Wang, Hai-Li Zhang and Ke Ma
nucl-th hep-ph