engleski

Measurements of {;;Xi };;{;;^-};; and overline{;;Xi };;{;;^+};; production in proton–proton interactions at sqrt{;;s_{;;NN};;};; = 17.3 hbox {;;Ge};;hbox {;;V};; in the NA61/SHINE experiment

The production of Xi (1321)- and Xi (1321)+ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 Ge/c. Double differential distributions in rapidity y and transverse momentum pT are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both Xi- and Xi +. The rapidity and transverse momentum spectra are compared to transport model predictions. The Xi - mean multiplicity in inelastic p+p interactions at 158 Ge/c is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.

strange particle-production ; pb-pb collisions ; nuclear collisions ; Baryon production ; model enhancement ; rapidity ; Gev/C

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