Subthreshold antiproton production in nucleus-nucleus collisions

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.1139· OSTI ID:5319432

Li, G Q; Ko, C M; Fang, X S; Zheng, Y M ^[1]

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1. Cyclotron Institute and Physics Department, Texas A M University, College Station, Texas 77843 (United States)

Antiproton production in nucleus-nucleus collisions at energies below the threshold for its production from the nucleon-nucleon interaction in free space is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The antiproton self-energies in the medium are obtained in the mean-field approximation from the [ital G]-parity transformation of the nucleon self-energies. Due to the decrease of antiproton mass in the medium as a result of the attractive scalar mean field, there is an enhanced production of primordinal antiprotons which are, however, mostly annihilated by nucelons as they propagate through the matter. The calculated final antiproton momentum spectrum is seen to agree reasonably with the experimental data.

• OSTI ID: 5319432
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663300* -- Nuclear Reactions & Scattering
General-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYON-BARYON INTERACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
DATA
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION REACTIONS
INFORMATION
INTERACTIONS
MATTER
MEAN-FIELD THEORY
NUCLEAR REACTIONS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
RELATIVISTIC RANGE
SELF-ENERGY
SPECTRA
THEORETICAL DATA