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The production of KS0 mesons in inelastic p+p collisions at beam momentum 158 GeV/c (sNN=17.3 GeV) was measured with the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron. Double-differential distributions were obtained in transverse momentum and rapidity. The mean multiplicity of KS0 was determined to be 0.162±0.001(stat.)±0.011(sys.). The results on KS0 production are compared with model predictions (EPOS 1.99, SMASH 2.0, PHSD and UrQMD 3.4 models) as well as with published world data.

This Erratum replaces, due to a discovery of coding mistakes, the following quantities: κ3/κ1 of the h+ − h− distribution presented in Fig. 6 and Table 6, κ4 listed in Table 4, and Ĉ4 presented in Fig. 7 and Table 5. All mentioned figures and tables were updated.

The NA61/SHINE collaboration studies at the CERN Super Proton Synchrotron (SPS) the onset of deconfinement in hadronic matter by the measurement of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents results on inclusive double-differential spectra and mean multiplicities of π- mesons produced in the 5% most central7Be + 9Be collisions at beam momenta of 19A, 30A, 40A, 75A and 150AGeV/c obtained by the so-called h- method which does not require any particle identification. The shape of the transverse mass spectra differs from the shapes measured in central Pb + Pb collisions and inelastic p+p interactions. The normalized width of the rapidity distribution decreases with increasing collision energy and is in between the results for inelastic nucleon–nucleon and central Pb + Pb collisions. The mean multiplicity of pions per wounded nucleon in central7Be + 9Be collisions is close to that in central Pb + Pb collisions up to 75AGeV/c. However, at the top SPS energy the result lies between those for nucleon–nucleon and Pb + Pb interactions. The results are discussed in the context of predictions for the onset of deconfinement at the CERN SPS collision energies.

Measurements of K∗(892)0 resonance production via its K+π- decay mode in inelastic p+p collisions at beam momenta 40 and 80 GeV/c (sNN=8.8 and 12.3 GeV) are presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The template method was used to extract the K∗(892)0 signal. Transverse momentum and rapidity spectra were obtained. The mean multiplicities of K∗(892)0 mesons were found to be (35.1±1.3(stat)±3.6(sys))·10-3 at 40 GeV/c and (58.3±1.9(stat)±4.9(sys))·10-3 at 80 GeV/c. The NA61/SHINE results are compared with the Epos1.99 and Hadron Resonance Gas models as well as with world data. The transverse mass spectra of K∗(892)0 mesons and other particles previously reported by NA61/SHINE were fitted within the Blast-Wave model. The transverse flow velocities are close to 0.1–0.2 of the speed of light and are significantly smaller than the ones determined in heavy nucleus-nucleus interactions at the same beam momenta.

Double-differential yields of Ξ15300 and Ξ¯15300 resonances produced in p+p interactions were measured at a laboratory beam momentum of 158 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 26×106 inelastic events. The spectra are extrapolated to full phase space resulting in mean multiplicity of Ξ15300 (6.73±0.25±0.67)×10-4 and Ξ¯15300 (2.71±0.18±0.18)×10-4. The rapidity and transverse momentum spectra and mean multiplicities were compared to predictions of string-hadronic and statistical model calculations.

A measurement of charged hadron pair correlations in two-dimensional Δ η Δ ϕ   space is presented. The analysis is based on total 30 million central Be + Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19 A , 30 A , 40 A , 75 A , and 150 A   Ge / c . Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The C ( Δ η , Δ ϕ ) correlation functions were compared with results from a similar analysis on p + p interactions at similar beam momenta per nucleon. General trends of the back-to-back correlations are similar in central Be + Be collisions and p + p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the Epos and UrQMD models are compared to the measurements. Evolution of an enhancement around ( Δ η , Δ ϕ ) = ( 0 , 0 ) with incident energy is observed in central Be + Be collisions. It is not predicted by both models and almost non-existing in proton–proton collisions at the same momentum per nucleon.

A measurement of charged hadron pair correlations in two-dimensional$$\\Delta \\eta \\Delta \\phi $$Δ η Δ ϕ   space is presented. The analysis is based on total 30 million central Be + Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19 A , 30 A , 40 A , 75 A , and 150 A  $$\\text {Ge} \\text {V}/c$$Ge / c . Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The$$C(\\Delta \\eta ,\\Delta \\phi )$$C ( Δ η , Δ ϕ ) correlation functions were compared with results from a similar analysis on p + p interactions at similar beam momenta per nucleon. General trends of the back-to-back correlations are similar in central Be + Be collisions and p + p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the Epos and UrQMD models are compared to the measurements. Evolution of an enhancement around$$(\\Delta \\eta ,\\Delta \\phi ) = (0,0)$$( Δ η , Δ ϕ ) = ( 0 , 0 ) with incident energy is observed in central Be + Be collisions. It is not predicted by both models and almost non-existing in proton–proton collisions at the same momentum per nucleon.

The measurement of K ∗ ( 892 ) 0 resonance production via its K + π - decay mode in inelastic p+p collisions at beam momentum 158  Ge V / c ( s NN = 17.3   Ge V ) is presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The template method was used to extract the K ∗ ( 892 ) 0 signal and double-differential transverse momentum and rapidity spectra were obtained. The full phase-space mean multiplicity of K ∗ ( 892 ) 0 mesons was found to be ( 78.44 ± 0.38 ( stat ) ± 6.0 ( sys ) ) · 10 - 3 . The NA61/SHINEresults are compared with the Epos1.99 and Hadron Resonance Gas models as well as with world data from p+p and nucleus–nucleus collisions.

The measurement of$$K^{*}(892)^0$$K ∗ ( 892 ) 0 resonance production via its$$K^{+}\\pi ^{-}$$K + π - decay mode in inelastic p+p collisions at beam momentum 158 $$\\text{ Ge }\\text{ V }\\!/\\!c$$Ge V / c ($$\\sqrt{s_{NN}}=17.3$$s NN = 17.3  $$\\text{ Ge }\\text{ V }$$Ge V ) is presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The template method was used to extract the$$K^{*}(892)^0$$K ∗ ( 892 ) 0 signal and double-differential transverse momentum and rapidity spectra were obtained. The full phase-space mean multiplicity of$$K^{*}(892)^0$$K ∗ ( 892 ) 0 mesons was found to be$$(78.44 \\pm 0.38 \\mathrm {(stat)} \\pm 6.0 \\mathrm {(sys)) \\cdot 10^{-3}}$$( 78.44 ± 0.38 ( stat ) ± 6.0 ( sys ) ) · 10 - 3 . The NA61/SHINEresults are compared with the Epos1.99 and Hadron Resonance Gas models as well as with world data from p+p and nucleus–nucleus collisions.