Inclusive Λ, Λ and Σ±(1385) production in 405 GeV/c pp interactions

We have investigated inclusive Λ, Λ and Σ±(1385) productions in 405 GeV/c pp interactions. The observed cross sections are σ(Λ)=4.05±0.39 mb, σ(Λ=0.63±0.17 mb, σ(Σ+(1385))=0.74±0.17 mb and σ(Λ−(1385))=0.56±0.17 mb. Λ production is dominant in a central region of ∣x∣≤0.4. The Λ/Λ production ratio at ∣x∣≈0 is found to be 1.2±0.5. The excess, about 0.2 mb, of σ(Λ+(1385)) over σ(Λ−(1385)) is most likely attributed to proton fragmentations (∣x∣≥0.4), and gives an evidence for scaling.