Comparative Analysis of Pion, Kaon and Proton Spectra Produced at PHENIX
  The shapes of invariant differential cross section for identified pi,K, p and pbar production as function of transverse momentum measured in pp collisions by the PHENIX detector are analyzed. Simultaneous fit of these data to the sum of exponential and power-law terms show significant difference in the exponential term contributions. This effect qualitatively explains the observed shape of the experimental K/pi and p/pi yield ratios measured as function of transverse momentum of produced hadrons. A picture with two types of mechanisms for hadron production is given. 
A. A. Bylinkin, A. A. Rostovtsev (Institute for Theoretical and   Experimental Physics, ITEP, Moscow, Russia)
hep-ph nucl-th