Gießen 2007 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 3: Elektromagnetische und Hadronische Sonden
HK 3.1: Talk
Monday, March 12, 2007, 18:00–18:15, A
New measurements of Δ G / G at COMPASS — •Susanne Koblitz — on behalf of the COMPASS Collaboration — Institut für Kernphysik,Universität Mainz, Becherweg 45, D-55099 Mainz
One of the main goals of the COMPASS experiment at CERN is the determination of the gluon polarisation in the nucleon, Δ G / G. It is determined from spin asymmetries in the scattering of polarised muons at 160 GeV/c off a polarised LiD target.
The gluon polarisation is accessed by the selection of photon-gluon fusion events. Such events are tagged either with a charmed meson or a hadron pair with high transverse momenta in the final state. The selection of charmed mesons is based on the reconstruction of decayed D ⋆ and D 0 mesons in the COMPASS spectrometer. For the high-pT hadron pairs two independent analyses are performed in the kinematic regimes of DIS (Q2 > 1 (GeV/c)2) and quasi-real photoproduction (Q2 < 1 (GeV/c)2.
For all three analysis the results for the data from 2002-2004 will be presented.