Antiproton production and annihilation in nuclear collisions at 15 A GeV

Journal Article · Mon May 11 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.2895· OSTI ID:7235175

Jahns, A; Stoecker, H; Greiner, W ^[1]; Sorge, H ^[2]

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1. Institut fuer Theoretische Physik, Johann Wolfgang Goethe Universitaet, Frankfurt am Main (Germany)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We present a calculation of antiproton yields in Si+Al and Si+Au collisions at 14.5{ital A} GeV in the framework of the relativistic quantum molecular dynamics approach (RQMD). Multistep processes lead to the formation of high-mass flux tubes. Their decay dominates the initial antibaryon yield. However, the subsequent annihilation in the surrounding baryon-rich matter suppresses the antiproton yield considerably: Two-thirds of all antibaryons are annihilated even for the light Si+Al system. Comparisons with preliminary data of the E802 experiment support this analysis.

• OSTI ID: 7235175
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663530 -- Nuclear Mass Ranges-- A=20-38-- (1992-)
663580 -- Nuclear Mass Ranges-- A=190-219-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM ISOTOPES
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYON-BARYON INTERACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY RANGE
EXTENDED PARTICLE MODEL
FERMIONS
GOLD ISOTOPES
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION REACTIONS
INTERACTIONS
ISOTOPES
MATHEMATICAL MODELS
MATTER
NUCLEAR REACTIONS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARK MODEL
RESCATTERING
SCATTERING
SILICON ISOTOPES
STRING MODELS
TEV RANGE
TEV RANGE 01-10