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 0.0271 ± 0.0015 ± 0.0014 at 2.0 AGeV to 0.202 ± 0.005 ± 0.010 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 a strong onset of any new production mechanism in heavy-ion reactions in this energy range beyond rescattering of hadrons. (C) 2000 Published by Elsevier Science B.V.
|Number of pages||8|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2000 Mar 9|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics