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.

11 pages, 8 figures

References in corpus (4)

• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Antiproton-nucleus collisions simulation within a kinetic approach with relativistic mean fields
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Dynamics of strangeness production in heavy-ion collisions near threshold energies

Cited by in corpus (4)

• Nuclear fragmentation and charge-exchange reactions induced by pions in the $\Delta$-resonance region
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• Isospin effect in peripheral heavy-ion collisions at Fermi energies
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions