Evidence from d + Au measurements for final state suppression of high p(T) hadrons in Au+Au collisions at RHIC

Collaboration
Jun, 2003
6 pages
Published in:
  • Phys.Rev.Lett. 91 (2003) 072304
e-Print:
Experiments:

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Abstract:
We report measurements of single-particle inclusive spectra and two-particle azimuthal distributions of charged hadrons at high transverse momentum (high pTp_T) in minimum bias and central d+Au collisions at sNN\sqrt{s_{NN}}=200 GeV. The inclusive yield is enhanced in d+Au collisions relative to binary-scaled p+p collisions, while the two-particle azimuthal distributions are very similar to those observed in p+p collisions. These results demonstrate that the strong suppression of the inclusive yield and back-to-back correlations at high pTp_T previously observed in central Au+Au collisions are due to final-state interactions with the dense medium generated in such collisions.
Note:
  • Final journal version. Data tables for figures may be downloaded from the STAR home page: http://www.star.bnl.gov --> Publications --> Access to STAR published data Journal-ref: Phys. Rev. Lett. 91, 072304(2003)
  • nucleus nucleus: colliding beams
  • deuteron nucleus: nuclear reaction
  • scattering: heavy ion
  • gold
  • central region
  • p p: interaction
  • hadron: multiple production
  • charged particle: multiplicity
  • transverse momentum: spectrum
  • angular distribution: two-particle