Evidence for the onset of deconfinement and quest for the critical point by NA49 at the CERN SPS

Journal Article · Tue May 15 00:00:00 EDT 2012 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778812050158· OSTI ID:22043739

Anticic, T ^[1]; Baatar, B ^[2]; Barna, D ^[3]; Bartke, J ^[4]; Beck, H ^[5]; Betev, L ^[6]; Bialkowska, H ^[7]; Blume, C ^[5]; Bogusz, M ^[8]; Boimska, B ^[7]; Book, J ^[5]; Botje, M ^[9]; Buncic, P ^[6]; Cetner, T ^[8]; Christakoglou, P ^[9]; Chung, P ^[10]; Chvala, O ^[11]; Cramer, J G ^[12]; Eckardt, V ^[13]; others, and

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1. Rudjer Boskovic Institute (Croatia)
2. Joint Institute for Nuclear Research (Russian Federation)
3. KFKI Research Institute for Particle and Nuclear Physics (Hungary)
4. Polish Academy of Sciences, H. Niewodniczanski Institute of Nuclear Physics (Poland)
5. Fachbereich Physik der Universitaet (Germany)
6. CERN (Switzerland)
7. Institute for Nuclear Studies (Poland)
8. Warsaw University of Technology, Faculty of Physics (Poland)
9. NIKHEF (Netherlands)
10. Stony Brook University (SUNYSB), Department of Chemistry (United States)
11. Charles University, Institute of Particle and Nuclear Physics (Czech Republic)
12. University of Washington, Nuclear Physics Laboratory (United States)
13. Max-Planck-Institut fuer Physik (Germany)

The NA49 results on hadron production obtained in PbPb collisions at SPS energies from 20 to 158 A GeV are shown and discussed as evidence for the onset of deconfinement. The primary measures are the pion yield, the kaon-to-pion ratio and the slope parameter of transverse mass distributions. The possible indication of the QCD critical point signatures was investigated in the event-by-event fluctuations of various observables such as the mean transverse momentum, particle multiplicity and azimuthal angle distributions as well as in the particle ratio fluctuations. The energy dependence of these observables was measured in central PbPb collisions in the full SPS energy range while for analysis of the system size dependence data from pp, CC, SiSi, and PbPb collisions at the top SPS energy were used.

• OSTI ID: 22043739
• Journal Information: Physics of Atomic Nuclei, Vol. 75, Issue 5; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CERN SPS SYNCHROTRON
ENERGY DEPENDENCE
FLUCTUATIONS
GEV RANGE
KAONS
LEAD 208 REACTIONS
LEAD 208 TARGET
MASS DISTRIBUTION
MULTIPARTICLE SPECTROMETERS
MULTIPLICITY
NUCLEAR REACTION YIELD
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PIONS
QUANTUM CHROMODYNAMICS
SILICON 28 REACTIONS
SILICON 28 TARGET
TRANSVERSE MOMENTUM