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System size dependence of hadron production in A + A collisions at 40-A-GeV beam energy

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for the collaboration.
2005
Published in:
  • J.Phys.G 31 (2005) S1131-S1136
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Abstract: (IOP)
Rapidity and transverse mass spectra of charged kaons and negative pions measured in C+C, Si+Si and minimum bias Pb+Pb collisions at 40AGeV are reported. A monotonous increase of the inverse slope parameter with system size is observed. TheK+/K−ratio rises withNWfrom the light ion collisions to peripheral Pb+Pb and stays constant from there on. A steep rise of theK+/π+ratio is observed for the small systems with the ratio in Si+Si collisions being slightly higher than in peripheral Pb+Pb collisions. The measurement of theK−/π−ratio in Si+Si collisions is significantly higher than the ratio in peripheral Pb+Pb collisions; it is rather close to the observedK−/π−ratio in central Pb+Pb collisions.
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