Production of $\Lambda$ hyperons in inelastic p+p interactions at 158 GeV/$c$

Abstract

Inclusive production of $\Lambda$-hyperons was measured with the large acceptance NA61/SHINE spectrometer at the CERN SPS in inelastic p+p interactions at beam momentum of 158~\GeVc. Spectra of transverse momentum and transverse mass as well as distributions of rapidity and x${}_{{}_F}$ are presented. The mean multiplicity was estimated to be $0.120\pm 0.006(stat.)\pm 0.010(sys.)$. The results are compared with previous measurements and predictions of the EPOS, UrQMD and FRITIOF models.

19 pages, 20 figures, 6 tables