Excitation Function of K+ and π+ Production in Au+Au Reactions at 2-10 AGeV
L. Ahle
Abstract
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 π+ mid-rapidity yields increases from 0.02710.00150.0014 at 2.0~AGeV to 0.2020.0050.010 at 10.7~AGeV and is larger than the K+/π+ 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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