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    Subthreshold Antiproton Production in Nucleus-Nucleus Collisions

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    PhysRevC.49.1139.pdf (546.5Kb)
    Date
    1994
    Author
    LI, GQ
    Ko, Che Ming
    Fang, X. S.
    Zheng, Y. M.
    Metadata
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    Abstract
    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 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 primordial antiprotons which are, however, mostly annihilated by nucleons as they propagate through the matter. The calculated final antiproton momentum spectrum is seen to agree reasonably with the experimental data.
    URI
    http://dx.doi.org/10.1103/PhysRevC.49.1139
    https://hdl.handle.net/1969.1/126839
    Description
    Journals published by the American Physical Society can be found at http://publish.aps.org/
    Subject
    HEAVY-ION COLLISIONS
    UEHLING-UHLENBECK MODEL
    TRANSPORT-THEORY
    VLASOV
    EQUATION
    P-NUCLEUS
    ENERGY
    MATTER
    PBAR
    Physics
    Department
    Physics and Astronomy
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    Citation
    GQ LI, Che Ming Ko, X. S. Fang and Y. M. Zheng. Phys.Rev.C 49 1139-1148 1994. "Copyright (1994) by the American Physical Society."

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