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Kaon and pion ratio probes of jet quenching in nuclear collisions |
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| Authors: | P. Lévai G. Papp G. Fai M. Gyulassy |
| Affiliation: | 1. KFKI RMKI Research Institute for Nuclear and Particle Physics, P.O. Box 49, H-1525, Budapest, Hungary 2. Department of Physics, Kent State University, 44242, Kent, OH, USA 3. Department of Physics, Columbia University, 538 W 120th Street, 10027, New York, NY, USA 4. Department of Theoretical Physics, Roland E?tv?s University, Pázmány P. 1/A, H-1117, Budapest, Hungary |
| Abstract: | 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?/K+ and K+/π+ 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 p T; in an intermediate p Tregion other particle production mechanisms dominate the K/π ratios. |
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