Recent Results from NA49

  • Peter Jacobs
  • Milton Toy
  • Glenn Cooper
  • Art Poskanzer
  • the NA49 Collaboration


NA49 is a large acceptance charged particle spectrometer at the CERN SPS, designed to study collisions of lead ions at beam energies up to 160 GeV/nucleon. Central collisions of heavy nuclei at these energies produce multiplicities that are unprecedented in accelerator-based nuclear and high energy physics experiments: over 1000 charged particles may be produced in a single collision. To image these enormously complex events, NA49 is based upon four large Time Projection Chambers (TPCs), two Vertex TPCs (VTPCs) placed sequentially along the beamline within large dipole magnets, and two Main TPCs (MTPCs) placed side-by-side downstream of the magnets. Particle identification over wide phase space is carried out via the measurement of specific ionization (<dE/dx>) in the TPC gas, and via Time of Flight over a narrower acceptance where the <dE/dx> technique does not have sufficient resolution. The principal trigger for heavy ion collisions is forward-going energy (E VETO ), measured by a calorimeter with a narrow apperture placed 25 m downstream of the target.


Transverse Momentum Radial Flow Elliptic Flow NA49 Collaboration Medium Bias 
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  1. 1.
    G. C. Rossi and G. Veneziano, Nucl. Phys. B123, 507 (1977); Phys. Rep. 63, 153 (1980).ADSCrossRefGoogle Scholar
  2. 2.
    D. Kharzeev, Phys. Lett. B378, 238 (1996).ADSGoogle Scholar
  3. 3.
    Stephen Vance, nucl-th/9802036 and contribution to these proceedings.Google Scholar
  4. 4.
    A. Capella and B. Z. Kopeliovich, Phys. Lett. B381, 325 (1996).ADSGoogle Scholar
  5. 5.
    J. Bächler et al. (NA35 Collaboration), Phys. Rev. Lett. 72, 1419 (1994).ADSCrossRefGoogle Scholar
  6. 6.
    H. Sorge, Phys. Rev. C52 3291 (1995).ADSGoogle Scholar
  7. 7.
    K. Werner, Phys. Rep. 232, 87 (1995).ADSCrossRefGoogle Scholar
  8. 8.
    A. Wróblewski, Acta Phys. Pol. B16, 397 (1985).Google Scholar
  9. 9.
    C. Bormann et al. (NA49 Collaboration), J. Phys. G23, 1817 (1997).ADSGoogle Scholar
  10. 10.
    P. Jacobs et al. (NA49 Collaboration), LBL-40258; to be published in the Proceedings of the Third International Conference on the Physics and Astrophysics of the Quark Gluon Plasmam, Jaipur, India, March 17-12, 1997.Google Scholar
  11. 11.
    M. Toy, Ph.D. Thesis, University of California at Los Angeles, 1998.Google Scholar
  12. 12.
    M. Aguilar-Benitez et al., Z. Phys. C50 405 (1991).Google Scholar
  13. 13.
    K. Lee, U. Heinz and E. Schnedermann, Z. Phys. C48, 525 (1990).Google Scholar
  14. 14.
    H. Appelshäuser et al. (NA49 Collaboration), hep-ex/9711024 (Z. Physik C, in press.)Google Scholar
  15. 15.
    H. Sorge, Phys. Rev. Lett. 78, 2309 (1997).ADSCrossRefGoogle Scholar
  16. 16.
    H. Appelshäuser et al. (NA49 Collaboration), nucl-ex/9711001 (Phys. Rev. Lett., in press.)Google Scholar
  17. 17.
    S. A. Voloshin, Phys. Rev. C55 R1630 (1997).ADSGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Peter Jacobs
    • 1
  • Milton Toy
    • 1
    • 2
  • Glenn Cooper
    • 1
    • 3
  • Art Poskanzer
    • 1
  • the NA49 Collaboration
  1. 1.Nuclear Science DivisionLawrence Berkeley National LaboratoryBerkeleyUSA
  2. 2.Department of PhysicsUniversity of California at Los AngelesLos AngelesUSA
  3. 3.Department of PhysicsUniversity of California at BerkeleyBerkeleyUSA

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