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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Electromagnetic and Hadronic Probes

HK 11.38: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Measurement of the Lambda Polarisation in the COMPASS Experiment — •B. Grube, M. Wiesmann, M. Becker, R. de Masi, J. Friedrich, A.-M. Fuchs, S. Gerassimov, B. Ketzer, I. Konorov, R. Kuhn, S. Paul, L. Schmitt, and Q. Weitzel — TU München, Physik Department E18

We present first results on transverse Lambda polarization from the 2002 COMPASS run at the CERN SPS. With the 160 GeV polarized muon beam on a polarized LiD target, Lambda and Antilambda production was observed with quasi-real photons (Q2<0.5 GeV2).

A measurement of transverse Lambda and Antilambda polarization was performed using the bias-cancelling method in order to minimize systematic effects. The polarization is studied in dependence on the kinematic variables xF and pt.

This work is supported by the BMBF and the Maier-Leibnitz-Labor, Garching.

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