Near-threshold production of the multi-strange Xi^- hyperon

P. Chung , N. N. Ajitanand , J. M. Alexander , M. Anderson , D. Best , F.P. Brady , T. Case , W. Caskey

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D. Cebra J.L. Chance B. Cole K. Crowe A. C. Das J.E. Draper M.L. Gilkes S. Gushue M. Heffner A.S. Hirsch E.L. Hjort W. Holzmann L. Huo M. Issah M. Justice M. Kaplan D. Keane J.C. Kintner J. Klay D. Krofcheck R. A. Lacey J. Lauret M.A. Lisa H. Liu Y.M. Liu J. Milan R. McGrath Z. Milosevich G. Odyniec D.L. Olson S. Panitkin N.T. Porile G. Rai H.G. Ritter J.L. Romero R. Scharenberg B. Srivastava N.T.B Stone T.J.M. Symons A. Taranenko J. Whitfield T. Wienold R. Witt L. Wood W.N. Zhang (E895 Collaboration) H. Oeschler

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classification ⚛️ nucl-ex

keywords multi-strangeproductionyieldcollisionshyperonlambdameasuredmodel

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The yield for the multi-strange $\Xi^{-}$ hyperon has been measured in 6 AGeV Au+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. The measured yield for $\Xi^{-}$ and $\Lambda$ are compared for several centralities. In central collisions the $\Xi^{-}$ yield is found to be in excellent agreement with statistical and transport model predictions, suggesting that multi-strange hadron production approaches chemical equilibrium in high baryon density nuclear matter.

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Near-threshold production of the multi-strange Xi^- hyperon

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