Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at s(NN)**(1/2) = 130-GeV

Collaboration
Jun, 2001
6 pages
Published in:
  • Phys.Rev.Lett. 87 (2001) 112303
e-Print:
Experiments:

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Abstract:
The minimum bias multiplicity distribution and the transverse momentum and pseudorapidity distributions for central collisions have been measured for negative hadrons (h-) in Au+Au interactions at sqrt(s_nn) = 130 GeV. The multiplicity density at midrapidity for the 5% most central interactions is dNh-/deta|_{eta = 0} = 280 +- 1(stat)+- 20(syst), an increase per participant of 38% relative to ppbar collisions at the same energy. The mean transverse momentum is 0.508 +- 0.012 GeV/c and is larger than in central Pb+Pb collisions at lower energies. The scaling of the h- yield per participant is a strong function of pt. The pseudorapidity distribution is almost constant within |eta|<1.
Note:
  • 6 pages, 3 figures
  • nucleus nucleus: colliding beams
  • scattering: heavy ion
  • gold
  • hadron: multiple production
  • negative particle: multiplicity
  • multiplicity: spectrum
  • rapidity spectrum
  • transverse momentum: spectrum
  • dependence: impact parameter
  • STAR