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The yield for the multi-strange $\Xi^{-}$ hyperon has been measured in 6 AGeVAu+Au collisions via reconstruction of its decay products $\pi^{-}$ and$\Lambda$, the latter also being reconstructed from its daughter tracks of$\pi^{-}$ and p. The measurement is rather close to the threshold for $\Xi^{-}$production and therefore provides an important test of model predictions. Themeasured yield for $\Xi^{-}$ and $\Lambda$ are compared for severalcentralities. In central collisions the $\Xi^{-}$ yield is found to be inexcellent agreement with statistical and transport model predictions,suggesting that multi-strange hadron production approaches chemical equilibriumin high baryon density nuclear matter.Comment: Submitted to PR

physical review letters

Near-Threshold Production of the Multistrange<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Ξ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>Hyperon

Near-Threshold Production of the MultistrangeΞ−Hyperon