Subthreshold antiproton production in nucleus-nucleus collisions

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.R1118· OSTI ID:5507381

Ko, C M; Xia, L H ^[1]

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1. Cyclotron Institute and Center for Theoretical Physics, Texas A M University, College Station, Texas 77843 (US)

Antiproton production from the secondary process {rho}{rho}{r arrow}{ital p{bar p}} is studied for nucleus-nucleus collisions at energies which are below the threshold for its production from the nucleon-nucleon reaction in the free space. In an expanding fireball model, we determine the {rho} abundance from the fusion of pions and find that for collisions at 2.1 GeV/nucleon the antiproton to negative pion ratio is {approx}5.5{times}10{sup {minus}7} and has a similar magnitude to that of the data.

• OSTI ID: 5507381
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

645200* -- High Energy Physics-- Particle Interactions & Properties-Theoretical
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ALKALINE EARTH ISOTOPES
ANNIHILATION
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYON-BARYON INTERACTIONS
BARYONS
BASIC INTERACTIONS
BEVALAC
BOSONS
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIREBALL MODEL
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION REACTIONS
INTERACTIONS
ISOTOPES
MATHEMATICAL MODELS
MATTER
MESONS
NUCLEAR MATTER
NUCLEAR REACTIONS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PROTONS
PSEUDOSCALAR MESONS
RHO-770 MESONS
SILICON ISOTOPES
VECTOR MESONS