Event-by-event fluctuations of the kaon to pion ratio in central Pb+Pb collisions at 158 GeV per Nucleon

  • 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.

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Author:Sergey V. AfanasievORCiDGND, NA49 Collaboration
ArXiv Id:http://arxiv.org/abs/hep-ex/0009053
Document Type:Preprint
Date of Publication (online):2005/09/29
Year of first Publication:2000
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2005/09/29
Source:Phys.Rev.Lett. 86 (2001), http://arxiv.org/abs/hep-ex/0009053
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht