Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Hadronenstruktur und -spektroskopie

HK 39.6: Talk

Thursday, March 22, 2012, 18:00–18:15, RW 2

Recent Results from the Measurement of Polarization Observables in the p^→p → pK⁺Λ Reaction at COSY-TOF — •Florian Hauenstein — Universität Erlangen-Nürnberg

The COSY-TOF detector setup was recently upgraded with a new tracking system including a Straw Tube Tracker (STT). This upgrade increases the reconstruction efficiency and the precision of the event reconstruction significantly. Together with the polarized beam it allows to determine the spin triplet pΛ scattering length. Also the production mechanism of the p^→p → pK⁺Λ reaction can be studied from polarization observables and the Dalitz plot. The latter can especially be used to determine contributions of N^* resonances.

Data from 2010 at 2.95 GeV/c beam momentum has already been analyzed. In fall 2011 a dedicated measurement with a polarized proton beam of 2.70 GeV/c momentum was performed to investigate the pΛ final state interaction in detail.

In this talk the status of the analysis for this recent data will be presented.