Possibility of cold nuclear compression in antiproton-nucleus collisions

Journal Article · Sun Aug 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.024602· OSTI ID:21419437

Larionov, A B ^[1]; Mishustin, I N; Satarov, L M ^[1]; Greiner, W ^[1]

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1. Frankfurt Institute for Advanced Studies, J.W. Goethe-Universitaet, D-60438 Frankfurt am Main (Germany)

We study the dynamical response of the {sup 16}O nucleus to an incident antiproton using the Giessen Boltzmann-Uehling-Uhlenbeck microscopic transport model with relativistic mean fields. A special emphasis is put on the possibility of a dynamical compression of the nucleus induced by the moving antiproton. Realistic antibaryon coupling constants to the mean meson fields are chosen in accordance with empirical data. Our calculations show that an antiproton embedded in the nuclear interior with momentum less than the nucleon Fermi momentum may create a locally compressed zone in the nucleus with a maximum density of about twice the nuclear saturation density. To evaluate the probability of the nuclear compression in high-energy p-bar-nucleus collisions, we adopt a two-stage scheme. This scheme takes into account the antiproton deceleration due to the cascade of p-barN rescatterings inside the nucleus (first stage), as well as the nuclear compression by the slow antiproton before its annihilation (second stage). With our standard model parameters, the fraction of p-bar annihilation events in the compressed zone is about 10{sup -5} for p-bar{sup 16}O collisions at p{sub lab}=3-10 GeV/c. Finally, possible experimental triggers aimed at selecting such events are discussed.

• OSTI ID: 21419437
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATION
ANNIHILATION
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
COLLISIONS
COMPRESSION
COUPLING CONSTANTS
DENSITY
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 01-10
GRAND UNIFIED THEORY
HADRONS
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MATTER
MEAN-FIELD THEORY
NUCLEI
NUCLEONS
OXYGEN 16
OXYGEN ISOTOPES
PARTICLE INTERACTIONS
PARTICLE MODELS
PHYSICAL PROPERTIES
PROTONS
QUANTUM FIELD THEORY
RELATIVISTIC RANGE
RESCATTERING
SATURATION
SCATTERING
SIMULATION
STABLE ISOTOPES
STANDARD MODEL
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UNIFIED GAUGE MODELS