TY - JOUR A1 - Mattiello, Raffaele A1 - Sorge, Heinz A1 - Stöcker, Horst A1 - Greiner, Walter T1 - K/π ratios in relativistic nuclear collisions : a signature for the quark-gluon plasma? T2 - Physical review letters N2 - Collisions of Si(14.5A GeV+Au are investigated in the relativistic-quantum-molecular-dynamics approach. The calculated pseudorapidity distributions for central collisions compare well with recent experimental data, indicating a large degree of nuclear stopping and thermalization. Nevertheless, nonequilibrium effects play an important role in such complex multihadron reactions: They lead to a strong enhancement of the total kaon production cross sections, in good agreement with the experimental data, without requiring the formation of a deconfined quark-gluon plasma. Y1 - 2006 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2577 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-28219 UR - http://link.aps.org/abstract/PRL/v63/p1459 VL - 63 IS - 14 SP - 1459 EP - 1462 ER -