Kaon and pion ratio probes of jet quenching in nuclear collisions
Scopus ID: 34347382222
Non-Abelian energy loss in quark gluon plasmas is shown to lead to novel hadron ratio suppression patterns in ultrarelativistic nuclear collisions. Here we investigate pion and kaon production in pp and AA collisions in a perturbative QCD frame, suppression pattern and hadron ratios. The K<sup>-</sup>/K<sup>+</sup> and K<sup>+</sup>/π <sup>+</sup> ratios are found to be most sensitive to the opacity (density) of the plasma. Experimental data indicate that the fragmentation dominated pQCD region will be reached only at higher PT; in an intermediate PT region other particle production mechanisms dominate the K/π ratios. © 2006 Akadémiai Kiadó, Budapest.