Event-by-event fluctuations of particle ratios in central Pb + Pb collisions at 20 to 158 AGeV

  • In the vicinity of the QCD phase transition, critical fluctuations have been predicted to lead to non-statistical fluctuations of particle ratios, depending on the nature of the phase transition. Recent results of the NA49 energy scan program show a sharp maximum of the ratio of K+ to Pi+ yields in central Pb+Pb collisions at beam energies of 20-30 AGeV. This observation has been interpreted as an indication of a phase transition at low SPS energies. We present first results on event-by-event fluctuations of the kaon to pion and proton to pion ratios at beam energies close to this maximum.

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Author:Christof RolandORCiDGND, NA49 Collaboration
ArXiv Id:http://arxiv.org/abs/nucl-ex/0403035
Document Type:Preprint
Date of Publication (online):2005/09/26
Year of first Publication:2004
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2005/09/26
Source:J.Phys. G30 (2004) , http://arxiv.org/abs/nucl-ex/0403035
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht