The Kolmogorov-Smirnov test and its use for the identification of fireball fragmentation

Details The Kolmogorov-Smirnov test and its use for the identification of fireball fragmentation The Kolmogorov-Smirnov test and its use for the identification of fireball fragmentation

2009-02-10

arxiv.org/abs/0902.1607v1

Phys.Rev.C80:024904,2009

Physics

Nuclear Physics

Nuclear Theory

9 pages, 10 figures

Scientific paper

10.1103/PhysRevC.80.024904

We propose an application of the Kolmogorov-Smirnov test for rapidity distributions of individual events in ultrarelativistic heavy ion collisions. The test is particularly suitable to recognise non-statistical differences between the events. Thus when applied to a narrow centrality class it could indicate differences between events which would not be expected if all events evolve according to the same scenario. In particular, as an example we assume here a possible fragmentation of the fireball into smaller pieces at the quark/hadron phase transition. Quantitative studies are performed with a Monte Carlo model capable of simulating such a distribution of hadrons. We conclude that the Kolmogorov-Smirnov test is a very powerful tool for the identification of the fragmentation process.

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