Antiproton production in 28Si-Nucleus interactions

J. Barrette, R. Bellwied, P. Braun-Munzinger, W. E. Cleland, T. Cormier, G. David, J. Dee, O. Dietzsch, E. Duek, M. Fatyga, D. Fox, S. V. Greene, J. R. Hall, T. K. Hemmick, N. Herrmann, R. W. Hogue, B. Hong, K. Jayananda, D. Kraus, B. Shiva KumarR. Lacasse, D. Lissauer, W. J. Llope, T. Ludlam, R. Majka, D. Makowiecki, S. K. Mark, S. McCorkle, J. T. Mitchell, M. Muthuswamy, E. O'Brien, V. Polychronakos, C. Pruneau, F. S. Rotondo, J. Sandweiss, N. C. da Silva, J. Simon-Gillo, J. Slaughter, U. Sonnadara, J. Stachel, H. Takai, E. M. Takagui, T. G. Throwe, L. Waters, C. Winter, K. Wolf, D. Wolfe, C. L. Woody, N. Xu, Y. Zhang, Z. Zhang, C. Zou

Research output: Contribution to journalArticlepeer-review


We have used the E814 apparatus to make a systematic study of antiproton production in collisions of 28Si ions at 14.6 GeV/c per nucleon with targets of Pb, Cu, and Al. We have measured the antiproton yield per interaction as a function of transverse energy and have found the yield to increase by a factor of ≈ 2 in going from the least to the most central collisions on the Pb target. A simple first-collision picture of antiproton production predicts the yield to increase by a factor of ≈ 11. We suggest that the discrepancy may result from the annihilation of antiprotons within the nuclear medium.

Original languageEnglish
Pages (from-to)599-602
Number of pages4
JournalNuclear Physics, Section A
Issue number1-2
Publication statusPublished - 1992 Jul 20
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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