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HK: Physik der Hadronen und Kerne

HK 8: Elektromagnetische und Hadronische Proben

HK 8.4: Vortrag

Freitag, 4. März 2005, 17:15–17:30, TU MA001

Measurement of Asymmetries in high-p_T Single Hadron Production at COMPASS ^† — •R. Kuhn, M. Becker, R. De Masi, A.-M. Dinkelbach, J. M. Friedrich, S. Gerassimov, B. Grube, B. Ketzer, I. Konorov, T. Nagel, S. Paul, L. Schmitt, and Q. Weitzel — TU München, Physik-Department E18

During the three beamtimes 2002–2004 COMPASS has measured hard scattering processes of polarized muons off a polarized ⁶LiD target. The spin asymmetry of the hadron production cross section at high transverse momenta is related to the polarized gluon density Δ G of the nucleon. A first analysis of this asymmetry for single hadrons at low Q² and small x_Bj will be presented.

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