Excitation function of K+ and π+ production in Au + Au reactions at 2-10 AGeV

L. Ahle, Y. Akiba, K. Ashktorab, M. D. Baker, D. Beavis, B. Budick, J. Chang, C. Chasman, Z. Chen, Y. Y. Chu, T. Chujo, J. Cumming, R. Debbe, J. C. Dunlop, W. Eldredge, K. Fleming, S. Y. Fung, E. Garcia, S. Gushue, H. HamagakiR. Hayano, G. H. Heintzelman, J. H. Kang, E. J. Kim, A. Kumagai, K. Kurita, J. H. Lee, Y. K. Lee, Y. Miake, A. C. Mignerey, M. Moulson, C. Muentz, K. Nagano, C. A. Ogilvie, J. Olness, K. Oyama, L. Remsberg, H. Sako, R. Seto, J. Shea, K. Shigaki, S. G. Steadman, G. S.F. Stephans, T. Tamagawa, M. J. Tannenbaum, S. Ueno-Hayashi, F. Videbaek, H. Xiang, F. Wang, K. Yagi, F. Zhu, B. B. Back, R. R. Betts, W. C. Chang, C. Y. Chi, J. B. Cumming, S. Y. Fung, R. Ganz, A. Gillitzer, W. F. Henning, D. J. Hofman, B. Holzman, S. Y. Kim, Y. Kwon, D. McLeod, V. Nanal, R. Pak, A. Ruangma, D. Russ, P. J. Stanskas, H. Wang, F. L.H. Wolfs, A. H. Wuosmaa, G. H. Xu, H. B. Yao, C. M. Zou

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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 0.0271 ± 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.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume476
Issue number1-2
DOIs
Publication statusPublished - 2000 Mar 9

Bibliographical note

Funding 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

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