Berlin 2005 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 30: Elektromagnetische und Hadronische Proben
HK 30.7: Talk
Tuesday, March 8, 2005, 18:15–18:30, TU MA001
Measurement of Transverse Lambda Polarization at COMPASS — •B. Grube, M. Becker, R. de Masi, J.M. Friedrich, A.-M. Dinkelbach, S. Gerassimov, B. Ketzer, I. Konorov, R. Kuhn, T. Nagel, S. Paul, L. Schmitt, Q. Weitzel, and M. Wiesmann — TU München, Physik Department E18
COMPASS has made a first analysis of the transverse Lambda polarization in quasi-real photo-production (Q2<0.5 (GeV/c)2) using a 160 GeV/c muon beam from the CERN SPS.
The transverse polarization with respect to the production plane was measured using the self-analyzing weak decay of the Λ and Λ. We have evaluated the polarization in different kinematic regions using the variables xF and pT. Systematic effects were reduced by utilizing the bias-canceling method.
This work is supported by the BMBF and the Maier-Leibnitz-Labor, Garching.