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arXiv · 1202.0748

Strangeness production in antiproton-nucleus collisions

A. B. Larionov·T. Gaitanos·U. Mosel
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Abstract

Antiproton annihilations on nuclei provide a very interesting way to study the behaviour of strange particles in the nuclear medium. In low energy $\bar p$ annihilations, the hyperons are produced mostly by strangeness exchange mechanisms. Thus, hyperon production in $\bar p A$ interactions is very sensitive to the properties of the antikaon-nucleon interaction in nuclear medium. Within the Giessen Boltzmann-Uehling-Uhlenbeck transport model (GiBUU), we analyse the experimental data on $Λ$ and $K^0_S$ production in $\bar p A$ collisions at $p_{\rm lab}=0.2-4$ GeV/c. A satisfactory overall agreement is reached, except for the $K^0_S$ production in $\bar p+^{20}$Ne collisions at $p_{\rm lab}=608$ MeV/c, where we obtain substantially larger $K^0_S$ production rate. We also study the $Ξ$ hyperon production, important in view of the forthcoming experiments at FAIR and J-PARC.

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A. B. Larionov, T. Gaitanos, U. Mosel. 2012-02-03. Strangeness production in antiproton-nucleus collisions. https://doi.org/10.1007/s10751-011-0387-4

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