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|
Bibliographical noteFunding Information:
This work was supported by the US Department of Energy under contracts with ANL (No. W-31-109-ENG-38), BNL (No. DE-AC02-98CH10886), University of California, Riverside (DE-FG03-86ER40271), Columbia University (No. DE-FG02-86-ER40281), University of Illinois, Chicago (No. DE-FG02-94ER40865), LLNL (No. W-7405-ENG-48), MIT (No DE-AC02-76ER03069), the US National Science Foundation under contracts with University of Rochester (PHY-9722606), US NASA under contract with University of California (No. NGR-05-003-513), Ministry of Education, Science, Sports and Culture (Japan), and by Korea KOSEF under contract with Yonsei University (KRF 1997-001-D00118).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics