Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2000-08-08
Eur.Phys.J.C18:651-663,2001
Physics
Nuclear Physics
Nuclear Experiment
13 pages, 16 figures, submitted to European Physical Journal C (revised results for scaling exponents)
Scientific paper
10.1007/s100520100578
Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (N_{part}) and the number of binary nucleon-nucleon collisions (N_{coll}) in 158 A GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as N_{part}^{1.08 \pm 0.06} and N_{coll}^{0.83 \pm 0.05} is observed. For the charged particle pseudorapidity density at midrapidity we find a scaling as N_{part}^{1.07 \pm 0.04} and N_{coll}^{0.82 \pm 0.03}. This faster than linear scaling with N_{part} indicates a violation of the naive Wounded Nucleon Model.
Aggarwal Madan M.
WA98 Collaboration
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