Determination of the spin triplet pΛ scattering length from the reaction vector pp → pK⁺Λ

The vector pp → pK⁺Λ reaction was measured with the COSY-TOF detector using a polarized proton beam of 2.7 GeV/c. These data are used to not only study the production mechanism via Dalitz plot and polarization observables, but also to extract the spin effective pΛ scattering length from the final state interaction in the pΛ invariant mass spectrum. Furthermore, it is possible to determine the spin triplet pΛ scattering length using the dependence of the Kaon analyzing power on the pΛ invariant mass. In this talk the extraction method as well as the results on the spin effective and spin triplet pΛ scattering length is shown. In addition, the dependence of the Kaon analyzing power on the pΛ invariant mass is given. The systematic errors of the extracted values are discussed.