Results from the PHOBOS experiment at RHIC

B. B. Back, M. D. Baker, D. S. Barton, R. R. Betts, R. Bindel, A. Budzanowski, W. Busza, A. Carroll, M. P. Decowski, E. Garcia, N. George, K. Gulbrandsen, S. Gushue, C. Halliwell, G. A. Heintzelman, C. Henderson, D. J. Hofman, R. Hołyński, B. Holzman, E. JohnsonJ. L. Kane, J. Katzy, N. Khan, W. Kucewicz, P. Kulinich, W. T. Lin, S. Manly, D. McLeod, J. Michalowski, A. C. Mignerey, J. Mülmenstädt, R. Nouicer, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, L. P. Remsberg, M. Reuter, C. Roland, G. Roland, L. Rosenberg, P. Sarin, P. Sawicki, W. Skulski, S. G. Steadman, P. Steinberg, G. S.F. Stephans, M. Stodulski, A. Sukhanov, J. L. Tang, R. Teng, A. Trzupek, C. Vale, G. J. Van Nieuwenhuizen, R. Verdier, B. Wadsworth, F. L.H. Wolfs, B. Wosiek, K. Woźniak, A. H. Wuosmaa, B. Wysłouch

Research output: Contribution to journalConference articlepeer-review


Au+Au collisions have been studied at center-of-mass energies of √sN N = 56 and 130 GeV using the PHOBOS detector at RHIC. Charged particle multiplicities have been measured as a function of center-of-mass energy, centrality and pseudo-rapidity, η. A total of 4100 ± 400 charged particles are observed in the pseudo-rapidity range -5.4 < η < 5.4 for the most central collisions. A strong elliptic flow signal is seen in peripheral collisions at η = 0. The measurement of an antiprotons to protons ratio of p̄/p = 0.60 ± 0.04(stat) ± 0.06(syst) indicates that a nearly baryon-free region is created at midrapidity.

Original languageEnglish
Pages (from-to)225-235
Number of pages11
JournalActa Physica Hungarica, Series A: Heavy Ion Physics
Issue number3-4
StatePublished - 2002
EventProceedings of the 17th Winter Workshop on Nuclear Dynamics - Park City, UT, United States
Duration: 10 Mar 200117 Mar 2001


  • Antiparticle - particle ratio
  • Charged particle multiplicity
  • Elliptic flow
  • Relativistic heavy-ion collisions


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