Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 412: QCD Experiment II

T 412.2: Talk

Thursday, March 8, 2007, 17:05–17:20, INF 327 SR 2

Δ G/G determination from high p_T hadron pairs — •Roman Hermann for the COMPASS collaboration — Institut für Kernphysik, Johann-Joachim-Becher-Weg 45, 55099 Mainz

COMPASS is the fixed target experiment at CERN SPS muon beam, where polarized 160 GeV muons are scattered off a polarized LiD target. The collected data provide the access to the polarized quark and gluon distributions.

Events with hadrons pairs, where both hadrons require a high transverse momentum p_T are probing the polarized gluon distribution via the photon-gluon-fusion process. In this contribution the actual status of Δ G/G analysis of the events in deep inelastic scattering region (Q²>1GeV²/c²) data will be presented. Special emphasis will be put on the MC simulations using the LEPTO generator and the estimate of false asymmetries.