Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Hadronenstruktur und -spektroskopie

HK 23.3: Vortrag

Dienstag, 18. März 2014, 17:30–17:45, HZ 1+2

Determination of the pΛ Scattering Length from the Reaction p^→p → pK⁺Λ — •Florian Hauenstein for the COSY-TOF collaboration — Universität Erlangen-Nürnberg

The p^→p → pK⁺Λ reaction was measured with the COSY-TOF detector using a polarized proton beam of 2.70 GeV/c. Beside the studies of the production mechanism via Dalitz plot and polarization observables the measurement allows to extract the pΛ scattering length from the final state interaction in the pΛ invariant mass spectrum. Furthermore it is possible to get the spin triplet pΛ scattering length using the dependence of the Kaon analyzing power on the invariant mass.

In this talk the extraction principle will be shown and preliminary results on the spin averaged and spin triplet pΛ scattering length as well as the Kaon analyzing power and its dependence on the invariant mass will be given. In contrast to the published COSY-TOF results at 2.95 GeV/c the symmetric part of the analyzing power does not vanish for low pΛ masses and so a determination of the spin triplet pΛ scattering length is possible.