Excitation Function of K$^+$ and $π^+$ Production in Au+Au Reactions at 2-10 AGeV

Details Excitation Function of K$^+$ and $π^+$ Production in Au+Au Reactions at 2-10 AGeV Excitation Function of K$^+$ and $π^+$ Production in Au+Au Reactions at 2-10 AGeV

1999-10-08

arxiv.org/abs/nucl-ex/9910008v1

Phys.Lett.B476:1-8,2000

Physics

Nuclear Physics

Nuclear Experiment

9 pages, 4 figures, submitted to Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)00037-X

Positive pion and kaon production from Au+Au reactions have been measured as a function of beam energy over the range 2.0-10.7~AGeV. Both the kaon and the pion production cross-sections at mid-rapidity are observed to increase steadily with beam kinetic energy. The ratio of K$^+$ to $\pi^+$ mid-rapidity yields increases from 0.0271$\pm0.0015\pm0.0014$ at 2.0~AGeV to 0.202$\pm0.005\pm0.010$ at 10.7~AGeV and is larger than the K$^+$/$\pi^+$ ratio from p+p reactions over the same beam energy region. There is no indication of an onset of any new production mechanism in heavy-ion reactions in this energy range beyond rescattering of hadrons.

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