Strangeness production in antiproton-nucleus annihilation

Abstract

The results of the microscopic transport calculations of $\bar{p}$-nucleus interactions within a GiBUU model are presented. The dominating mechanism of hyperon production is the strangeness exchange processes $\bar{K}N\to Y\pi$ and $\bar{K}N\to \Xi K$. The calculated rapidity spectra of $\Xi$ hyperons are significantly shifted to forward rapidities with respect to the spectra of $S=-1$ hyperons. We argue that this shift should be a sensitive test for the possible exotic mechanisms of $\bar{p}$-nucleus annihilation. The production of the double $\Lambda$-hypernuclei by ${\Xi }^{-}$ interaction with a secondary target is calculated.

Comments: Proceedings of the 12th Int. Workshop on Meson Production, Properties and Interaction (MESON-2012), Cracow, 31.05-05.06.2012