Antiproton production in 28Si-Nucleus interactions

J Barrette,L Waters,R Lacasse,D Makowiecki,K Jayananda,J Slaughter,S Mccorkle,Y Zhang,D Lissauer,N Herrmann,N Xu,J Sandweiss,J Dee,G David,O Dietzsch,Moorthy S Muthuswamy ,E O’brien ,T Ludlam ,W J Llope ,C Winter ,J T Mitchell ,E M Takagui ,D Wolfe ,S K Mark ,D U J Sonnadara ,Z Zhang ,B S Kumar ,S V Greene ,T G Throwe ,C Pruneau ,Thomas Michael Cormier ,T K Hemmick ,D Kraus ,K Wolf ,R Bellwied ,M Fatyga ,F S Rotondo ,Eliana Aparecida De Rezende Duek ,B Hong ,V Polychronakos ,D Fox ,J R Hall ,P Braun‐Munzinger ,J Simon‐Gillo ,H Takai ,J Stachel ,R Majka ,R Hogue ,W Cleland ,N.c Da Silva ,C L Woody ,C Zou

doi:10.1016/0375-9474(92)90625-t

Antiproton production in 28Si-Nucleus interactions

J Barrette, L Waters + Show 50 more

https://doi.org/10.1016/0375-9474(92)90625-t

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Journal: Nuclear physics. A	Publication Date: Jul 1, 1992
Citations: 1

Affiliation: McGill University, University of New Mexico, Yale University, University of Pittsburgh, GSI Helmholtz Centre for Heavy Ion Research, Stony Brook University, State University of New York, Universidade de São Paulo, Brookhaven National Laboratory, Texas A&M University, Los Alamos National Laboratory

#Antiproton Production In Collisions #Function Of Transverse Energy + Show 8 more

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Abstract

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.

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