Measurements of $\Xi {\left(1530\right)}^0$ and $\overline{\Xi }{\left(1530\right)}^0$ production in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV in the NA61/SHINE experiment

Abstract

Double-differential yields of $\Xi {\left(1530\right)}^0$ and $\overline{\Xi }{\left(1530\right)}^0$ resonances produced in \pp interactions were measured at a laboratory beam momentum of 158~\GeVc. This measurement is the first of its kind in \pp interactions below LHC energies. It was performed at the CERN SPS by the \NASixtyOne collaboration. Double-differential distributions in rapidity and transverse momentum were obtained from a sample of 26$\cdot$10${}^6$ inelastic events. The spectra are extrapolated to full phase space resulting in mean multiplicity of $\Xi {\left(1530\right)}^0$ (6.73 $\pm$ 0.25 $\pm$ 0.67)$\times 10^{-4}$ and $\overline{\Xi }{\left(1530\right)}^0$ (2.71 $\pm$ 0.18 $\pm$ 0.18)$\times 10^{-4}$. The rapidity and transverse momentum spectra and mean multiplicities were compared to predictions of string-hadronic and statistical model calculations.

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