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We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb+Pb collisions. After accounting for the fluctuations due to detector resolution and finite number statistics we derive an upper limit on genuine non-statistical fluctuations, perhaps related to a first or second order QCD phase transition. Such fluctuations are shown to be very small.
Im Märchen schläft Dornröschen so lange, bis ein Prinz sie wach küsst. In der Rechtsgeschichte warten viele ehemals prominente Juristen darauf, dornröschengleich von einem Doktoranden erweckt zu werden. Christoph Mauntel will den Schwaben Carl Georg v. Wächter wieder ins rechte Licht rücken. Programmatisch darf sich Mauntel nicht nur über seinen Doktorvater Hans-Peter Benöhr dem Netzwerk der Frankfurter (Historischen) Schule zurechnen. ...
The directed and elliptic flow of protons and charged pions has been observed from the semi-central collisions of a 158 GeV/nucleon Pb beam with a Pb target. The rapidity and transverse momentum dependence of the flow has been measured. The directed flow of the pions is opposite to that of the protons but both exhibit negative flow at low pt. The elliptic flow of both is fairly independent of rapidity but rises with pt. PACS numbers: 25.75.-q, 25.75.Ld