Journal article

Publication year: 1994

Pages: 388-405

Journal: Physical Review C

Volume number: 50

Issue number: 1

ISSN: 0556-2813

eISSN: 1089-490X

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevC.50.388

Publisher: American Physical Society

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 ρ>ρ0 we examine the differential antiproton spectra as a function of the antiproton self-energy. A detailed comparison with the available experimental data for p-nucleus and nucleus-nucleus reactions shows that the antiproton feels a moderately attractive mean field at normal nuclear matter density ρ0 which is in line with a dispersive potential extracted from the free annihilation cross section.

Harvard Citation style: Teis, S., Cassing, W., Maruyama, T. and Mosel, U. (1994) Analysis of subthreshold antiproton production in p-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach, Physical Review C, 50(1), pp. 388-405. https://doi.org/10.1103/PhysRevC.50.388

APA Citation style: Teis, S., Cassing, W., Maruyama, T., & Mosel, U. (1994). Analysis of subthreshold antiproton production in p-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach. Physical Review C. 50(1), 388-405. https://doi.org/10.1103/PhysRevC.50.388