Transverse mass distributions of neutral pions from $^{208}$Pb-induced reactions at 158$\cdot A$ GeV

Details Transverse mass distributions of neutral pions from $^{208}$Pb-induced reactions at 158$\cdot A$ GeV Transverse mass distributions of neutral pions from $^{208}$Pb-induced reactions at 158$\cdot A$ GeV

2001-08-03

arxiv.org/abs/nucl-ex/0108006v2

Eur.Phys.J.C23:225-236,2002

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 15 figures, revised version accepted for publication in EUR.PHYS.J. C

Scientific paper

10.1007/s100520100886

Results on transverse mass spectra of neutral pions measured at central rapidity are presented for impact parameter selected 158$\cdot A$ GeV Pb + Pb, and Pb + Nb collisions. The distributions cover the range $0.5 \mathrm{GeV}/c^{2} \le m_{T} - m_{0} \le 4 \mathrm{GeV}/c^{2}$. The change of the spectral shape with centrality is studied in detail. In going from peripheral to medium central collisions there is a nuclear enhancement increasing with transverse mass similar to the well known Cronin effect, while for very central collisions this enhancement appears to be weaker than expected.

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