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

Double-differential yields of $${\Xi \left( 1530\right) ^{0}} $$ and $${\overline{\Xi }\left( 1530\right) ^{0}} $$ resonances produced in p+p interactions were measured at a laboratory beam momentum of 158 $$\text{ GeV }\!/\!c$$ . This measurement is the first of its kind in p+p interactions below LHC energies. It was performed at the CERN SPS by the NA61/SHINE collaboration. Double-differential distributions in rapidity and transverse momentum were obtained from a sample of $$26\times 10^6$$ 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.