Comparison of Strangeness Production between A+A and p+p Reactions from 2 to 160 AGeV

Details Comparison of Strangeness Production between A+A and p+p Reactions from 2 to 160 AGeV Comparison of Strangeness Production between A+A and p+p Reactions from 2 to 160 AGeV

1999-11-03

arxiv.org/abs/nucl-th/9911015v1

Phys.Rev. C61 (2000) 031901

Physics

Nuclear Physics

Nuclear Theory

14 pages, 4 figures, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.61.031901

The measured K$^+/\pi^+$ ratios from heavy-ion reactions are compared with the K$^+/\pi^+$ ratios from p+p reactions over the energy range 2-160 AGeV. The K/$\pi$ enhancement in heavy-ion reactions is largest at the lower energies, consistent with strangeness production in secondary scattering becoming relatively more important than initial collisions near the kaon production threshold. The enhancement decreases steadily from 4 to 160 AGeV, suggesting that the same enhancement mechanism of hadronic rescattering and decay of strings may be applicable over this full energy range. Based on existing data, the mid-rapidity K$^+/\pi^+$ ratio is predicted to be $0.27\pm0.05$ for the forthcoming Pb+Pb reactions at 40 AGeV/c.

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