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Physics of Atomic Nuclei

, Volume 75, Issue 5, pp 556–566 | Cite as

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

  • G. L. MelkumovEmail author
  • T. Anticic
  • B. Baatar
  • D. Barna
  • J. Bartke
  • H. Beck
  • L. Betev
  • H. Białkowska
  • C. Blume
  • M. Bogusz
  • B. Boimska
  • J. Book
  • M. Botje
  • P. Bunčić
  • T. Cetner
  • P. Christakoglou
  • P. Chung
  • O. Chvala
  • J. G. Cramer
  • V. Eckardt
  • Z. Fodor
  • P. Foka
  • V. Friese
  • M. Gaździcki
  • K. Grebieszkow
  • C. Höhne
  • K. Kadija
  • A. Karev
  • V. I. Kolesnikov
  • T. Kolleger
  • M. Kowalski
  • D. Kresan
  • A. Laszlo
  • R. Lacey
  • M. van Leeuwen
  • M. Mackowiak
  • M. Makariev
  • A. I. Malakhov
  • M. Mateev
  • M. Mitrovski
  • St. Mrówczyński
  • N. Nicolic
  • G. Pálla
  • A. D. Planagiotou
  • W. Peryt
  • J. Pluta
  • D. Prindle
  • F. Pühlhofer
  • R. Renfordt
  • C. Roland
  • G. Roland
  • M. Rybczyński
  • A. Rybicki
  • A. Sandoval
  • N. Schmitz
  • T. Schuster
  • P. Seyboth
  • F. Siklér
  • E. Skrzypczak
  • M. Slodkowski
  • G. Stefanek
  • R. Stock
  • H. Ströbele
  • T. Susa
  • M. Szuba
  • M. Utvić
  • D. Varga
  • M. Vassiliou
  • G. I. Veres
  • G. Vestergombi
  • D. Vranić
  • Z. Włodarczyk
  • A. Wojtaszek-Szwarc
Elementary Particles and Fields Experiment

Abstract

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.

Keywords

Transverse Momentum PbPb Collision Star Collab Inverse Slope Parameter Central PbPb Collision 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • G. L. Melkumov
    • 1
    Email author
  • T. Anticic
    • 2
  • B. Baatar
    • 1
  • D. Barna
    • 3
  • J. Bartke
    • 4
  • H. Beck
    • 5
  • L. Betev
    • 6
  • H. Białkowska
    • 7
  • C. Blume
    • 5
  • M. Bogusz
    • 8
  • B. Boimska
    • 7
  • J. Book
    • 5
  • M. Botje
    • 9
  • P. Bunčić
    • 6
  • T. Cetner
    • 8
  • P. Christakoglou
    • 9
  • P. Chung
    • 10
  • O. Chvala
    • 11
  • J. G. Cramer
    • 12
  • V. Eckardt
    • 13
  • Z. Fodor
    • 3
  • P. Foka
    • 14
  • V. Friese
    • 14
  • M. Gaździcki
    • 5
    • 15
  • K. Grebieszkow
    • 8
  • C. Höhne
    • 14
  • K. Kadija
    • 2
  • A. Karev
    • 6
  • V. I. Kolesnikov
    • 1
  • T. Kolleger
    • 5
  • M. Kowalski
    • 4
  • D. Kresan
    • 14
  • A. Laszlo
    • 3
  • R. Lacey
    • 10
  • M. van Leeuwen
    • 9
  • M. Mackowiak
    • 8
  • M. Makariev
    • 16
  • A. I. Malakhov
    • 1
  • M. Mateev
    • 17
  • M. Mitrovski
    • 5
  • St. Mrówczyński
    • 15
  • N. Nicolic
    • 2
  • G. Pálla
    • 3
  • A. D. Planagiotou
    • 18
  • W. Peryt
    • 8
  • J. Pluta
    • 8
  • D. Prindle
    • 12
  • F. Pühlhofer
    • 19
  • R. Renfordt
    • 5
  • C. Roland
    • 20
  • G. Roland
    • 20
  • M. Rybczyński
    • 15
  • A. Rybicki
    • 4
  • A. Sandoval
    • 14
  • N. Schmitz
    • 13
  • T. Schuster
    • 5
  • P. Seyboth
    • 13
  • F. Siklér
    • 3
  • E. Skrzypczak
    • 21
  • M. Slodkowski
    • 8
  • G. Stefanek
    • 15
  • R. Stock
    • 5
  • H. Ströbele
    • 5
  • T. Susa
    • 2
  • M. Szuba
    • 8
  • M. Utvić
    • 5
  • D. Varga
    • 22
  • M. Vassiliou
    • 18
  • G. I. Veres
    • 3
  • G. Vestergombi
    • 3
  • D. Vranić
    • 14
  • Z. Włodarczyk
    • 15
  • A. Wojtaszek-Szwarc
    • 15
  1. 1.Joint Institute for Nuclear ResearchDubnaRussia
  2. 2.Rudjer Boskovic InstituteZagrebCroatia
  3. 3.KFKI Research Institute for Particle and Nuclear PhysicsBudapestHungary
  4. 4.H. Niewodniczański Institute of Nuclear PhysicsPolish Academy of SciencesCracowPoland
  5. 5.Fachbereich Physik der UniversitätFrankfurtGermany
  6. 6.CERNGenevaSwitzerland
  7. 7.Institute for Nuclear StudiesWarsawPoland
  8. 8.Faculty of PhysicsWarsaw University of TechnologyWarsawPoland
  9. 9.NIKHEFAmsterdamNetherlands
  10. 10.Department of ChemistryStony Brook University (SUNYSB)Stony BrookUSA
  11. 11.Institute of Particle and Nuclear PhysicsCharles UniversityPragueCzech Republic
  12. 12.Nuclear Physics LaboratoryUniversity of WashingtonSeattleUSA
  13. 13.Max-Planck-Institut für PhysikMunichGermany
  14. 14.Gesellschaft für Schwerionenforschung (GSI)DarmstadtGermany
  15. 15.Institute of Physics Świetokrzyska AcademyKielcePoland
  16. 16.Institute for Nuclear Research and Nuclear EnergySofiaBulgaria
  17. 17.Atomic Physics DepartmentSofia University St. Kliment OhridskiSofiaBulgaria
  18. 18.Department of PhysicsUniversity of AthensAthensGreece
  19. 19.Fachbereich Physik der UniversitätMarburgGermany
  20. 20.MITCambridgeUSA
  21. 21.Institute for Experimental PhysicsUniversity of WarsawWarsawPoland
  22. 22.Eötvös Loránt UniversityBudapestHungary

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