Measurement of the Gluon Polarization of the Nucleon at COMPASS

The determination of the gluon polarization ΔG/G represents one of the main goals of the COMPASS Collaboration at CERN. This quantity is experimentally accessible by selecting photon gluon fusion (PGF) events in the scattering of a polarized 160 GeV muon beam off a polarized 6LiD target. At COMPASS the PGF mechanism is tagged by means of three different channels: charmed meson production and high-pT hadron pairs in either electro-production (Q2>1GeV2) or quasi-real photo-production (Q2<1GeV2). The status of the different analyses and the ΔG/G results obtained from the 2002-04 data samples are presented. The most precise measurement comes from the hight-pT quasi-real photo-production, yielding a small gluon polarization.