Midrapidity inclusive densities in high energy $pp$ collisions in   additive quark model
  High energy (CERN SPS and LHC) inelastic $pp$ ($p\bar p$) scattering is treated in the framework of additive quark model together with Pomeron exchange theory. We extract the midrapidity inclusive density of the charged secondaries produced in a single quark-quark collision and investigate its energy dependence. Predictions for the $\pi p$ collisions are presented. 
Yu.M. Shabelski and A.G. Shuvaev
hep-ph