Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-09-25
Phys.Rev.Lett.86:1965-1969,2001
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.86.1965
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.
Afanasiev
collaboration NA49
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