Production of fragments and hyperfragments in antiproton-nucleus collisions

Abstract

Formation mechanism of fragments with strangeness in collisions of antiprotons on nuclei has been investigated within the Lanzhou quantum molecular dynamics (LQMD) transport approach combined with a statistical model (GEMINI) for describing the decays of excited fragments. Production of strange particles in the antiproton induced nuclear reactions is modeled within the LQMD model, in which all possible reaction channels such as elastic scattering, annihilation, charge exchange and inelastic scattering in antibaryon-baryon, baryon-baryon and meson-baryon collisions have been included. A coalescence approach is developed for constructing hyperfragments in phase space after de-excitation of nucleonic fragments. The combined approach could describe the production of fragments in low-energy antiproton induced reactions. Hyperfragments are formed within the narrower rapidities and lower kinetic energies. It has advantage to produce heavier hyperfragments and hypernuclides with strangeness s=-2 (double-$\Lambda$ fragments) and s=1 ($\overline{\Lambda }$-fragments) in antiproton induced reactions.

6 pages, 5 figures

References in corpus (2)

• Antiproton-nucleus collisions simulation within a kinetic approach with relativistic mean fields
• Particle production in antiproton induced nuclear reactions

Cited by in corpus (7)

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• Strangeness and hypernuclear production in fragmentation reactions induced by antikaons
• Dynamics of light hypernuclei in collisions of ${}^{197}$Au+${}^{197}$Au at GeV energies
• Strangeness production and hypernuclear formation in proton and antiproton induced reactions
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• Unexpected neutron/proton ratio and isospin effect in low-energy antiproton induced reactions