Measurements of Ξ15300 and Ξ¯15300 production in proton–proton interactions at sNN = 17.3 GeV in the NA61/SHINE experiment

Abstract

Double-differential yields of $\mathrm{\Xi }{\left(1530\right)}^0$ and $\overline{\mathrm{\Xi }}{\left(1530\right)}^0$ 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 $\mathrm{\Xi }{\left(1530\right)}^0$ ($6.73\pm 0.25\pm 0.67)\times {10}^{-4}$ and $\overline{\mathrm{\Xi }}{\left(1530\right)}^0$ ($2.71\pm 0.18\pm 0.18)\times {10}^{-4}$. The rapidity and transverse momentum spectra and mean multiplicities were compared to predictions of string-hadronic and statistical model calculations.