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Measurements of Xi⁻ and overline{Xi}⁺ production in proton-proton interactions at sqrt{s_(NN)} = 17.3 GeV in the NA61/SHINE experiment
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Measurements of Xi⁻ and overline{Xi}⁺ production in proton-proton interactions at sqrt{s_(NN)} = 17.3 GeV in the NA61/SHINE experiment
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The production of $\Xi(1321)^{-}$ and $\overline{\Xi}(1321)^{+}$ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/textit{c}. Double differential distributions in rapidity y and transverse momentum $p_{T}$ are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both $\Xi^{-}$ and $\overline{\Xi}^{+}$. The rapidity and transverse momentum spectra are compared to transport model predictions. The $\Xi^{-}$ mean multiplicity in inelastic p+p interactions at 158~\GeVc is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.
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