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Title: Analysis of subthreshold antiproton production in [ital p]-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach

Abstract

We calculate the subthreshold production of antiprotons in the Lorentz-covariant relativistic Boltzmann-Uehling-Uhlenbeck (RBUU) approach employing a weighted testparticle method to treat the antiproton propagation and absorption nonperturbatively. We find that the antiproton differential cross sections are highly sensitive to the baryon and antiproton self-energies in the dense baryonic environment. Adopting the baryon scalar and vector self-energies from the empirical optical potential for proton-nucleus elastic scattering and from Dirac-Brueckner calculations at higher density [rho][gt][rho][sub 0] we examine the differential antiproton spectra as a function of the antiproton self-energy. A detailed comparison with the available experimental data for [ital p]-nucleus and nucleus-nucleus reactions shows that the antiproton feels a moderately attractive mean field at normal nuclear matter density [rho][sub 0] which is in line with a dispersive potential extracted from the free annihilation cross section.

Authors:
; ; ;  [1]
  1. (Institut fuer Theoretische Physik, Universitaet Giessen, D-35392 Giessen (Germany))
Publication Date:
OSTI Identifier:
7103706
Alternate Identifier(s):
OSTI ID: 7103706
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 50:1; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTIPROTONS; PARTICLE PRODUCTION; HEAVY ION REACTIONS; PROTON REACTIONS; DIFFERENTIAL CROSS SECTIONS; MANY-BODY PROBLEM; NUCLEAR MATTER; OPTICAL MODELS; RELATIVISTIC RANGE; ANTIBARYONS; ANTIMATTER; ANTINUCLEI; ANTINUCLEONS; ANTIPARTICLES; BARYON REACTIONS; BARYONS; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRON REACTIONS; HADRONS; MATTER; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS 663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-); 663430 -- Nucleon-Induced Reactions & Scattering-- (1992-); 663000 -- Nuclear Physics-- (1992-); 662340 -- Hadron Interactions-- (1992-)

Citation Formats

Teis, S., Cassing, W., Maruyama, T., and Mosel, U. Analysis of subthreshold antiproton production in [ital p]-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach. United States: N. p., 1994. Web. doi:10.1103/PhysRevC.50.388.
Teis, S., Cassing, W., Maruyama, T., & Mosel, U. Analysis of subthreshold antiproton production in [ital p]-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach. United States. doi:10.1103/PhysRevC.50.388.
Teis, S., Cassing, W., Maruyama, T., and Mosel, U. Fri . "Analysis of subthreshold antiproton production in [ital p]-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach". United States. doi:10.1103/PhysRevC.50.388.
@article{osti_7103706,
title = {Analysis of subthreshold antiproton production in [ital p]-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach},
author = {Teis, S. and Cassing, W. and Maruyama, T. and Mosel, U.},
abstractNote = {We calculate the subthreshold production of antiprotons in the Lorentz-covariant relativistic Boltzmann-Uehling-Uhlenbeck (RBUU) approach employing a weighted testparticle method to treat the antiproton propagation and absorption nonperturbatively. We find that the antiproton differential cross sections are highly sensitive to the baryon and antiproton self-energies in the dense baryonic environment. Adopting the baryon scalar and vector self-energies from the empirical optical potential for proton-nucleus elastic scattering and from Dirac-Brueckner calculations at higher density [rho][gt][rho][sub 0] we examine the differential antiproton spectra as a function of the antiproton self-energy. A detailed comparison with the available experimental data for [ital p]-nucleus and nucleus-nucleus reactions shows that the antiproton feels a moderately attractive mean field at normal nuclear matter density [rho][sub 0] which is in line with a dispersive potential extracted from the free annihilation cross section.},
doi = {10.1103/PhysRevC.50.388},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 50:1,
place = {United States},
year = {1994},
month = {7}
}