Particle production in antiproton induced nuclear reactions

Abstract

The quantum molecular dynamics model has been improved to investigate the reaction dynamics induced by antiprotons. The reaction channels of elastic scattering, annihilation, charge exchange and inelastic collisions have been included in the model. Dynamics on particle production, in particular pions, kaons, antikaons and hyperons, is investigated in collisions of $\overline{p}$ on ${}^{12}$C, ${}^{20}$Ne, ${}^{40}$Ca, ${}^{112}$Sn, ${}^{181}$Ta, ${}^{197}$Au and ${}^{238}$U from a low to high incident momentum. The rapidity and momentum distributions of ${\pi }^{+}$ and protons from the LEAR measurements can be well reproduced. The impacts of system size and incident momentum on particle emissions are investigated from the inclusive spectra, transverse momentum and rapidity distributions. It is found that the annihilations of $\overline{p}$ on nucleons are of importance on the particle production. Hyperons are mainly produced via meson induced reactions on nucleons and strangeness exchange collisions when the incident momentum is below the threshold value of annihilation reaction. A higher nuclear temperature is obtained from the kaon emission, but it has a lower value for hyperon production.

arXiv comment11 pages, 8 figures

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Cited by in corpus (9)

• Nuclear dynamics and particle production near threshold energies in heavy-ion collisions
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Nuclear fragmentation and charge-exchange reactions induced by pions in the $\Delta$-resonance region
• Production of fragments and hyperfragments in antiproton-nucleus collisions
• Unexpected neutron/proton ratio and isospin effect in low-energy antiproton induced reactions
• Isospin effect in peripheral heavy-ion collisions at Fermi energies
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• Antiproton production in heavy-ion collisions at subthreshold energies
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions