New Results on image from COMPASS Experiment at CERN Original Research Article

The gluon polarisation, Δg/g, is determined from photon-gluon fusion (PGF) events produced in scattering of 160 GeV polarised muons off polarised deuterons. Two independent methods based on LO QCD are used to extract PGF events: selection of D or D* mesons or a pair of high pt hadrons. In the former we use the data collected in 2002-2004 and 2006 and apply a new method of the signal strength parametrisation. In the latter we select View the MathML source region from 2002-2004 data and apply a new method of accounting for background processes.