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Non Identical strange particle correlations in Au-Au collisions at $\sqrt{s_{NN}}=$ 200 GeV from the STAR experiment

G. Renault·The STAR Collaboration
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Abstract

Information about the space-time evolution of colliding nuclei can be extracted correlating particles emitted from nuclear collisions. The high density of particles produced in the STAR experiment allows the measurement of non-identical strange particle correlations. Due to the absence of Coulomb interaction, $p-Λ$ and $\bar{p}-Λ$ systems are more sensitive to the source size than $p-p$ pairs. Strong interaction potential has been studied using $p-Λ$, and for the first time, $\bar{p}-Λ$ pairs. The experimental correlation functions have been described in the frame of a model based on the $p-n$ interaction. The first preliminary measurement of $π$ - $Ξ$ correlations has been performed, allowing to extract information about the freeze-out time and the space-time asymmetries in particle emission closely related to the transverse radial expansion and decay of resonances.

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G. Renault, The STAR Collaboration. 2004-04-21. Non Identical strange particle correlations in Au-Au collisions at $\sqrt{s_{NN}}=$ 200 GeV from the STAR experiment. https://arxiv.org/abs/hep-ex/0404024

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