$\Delta G$ results (open charm and high-$p_{T}$)

One of the missing keys in the present understanding of the spin structure of the nucleon is the contribution from the gluons: the so-called gluon polarisation. This quantity can be determined in DIS through the Photon-Gluon Fusion (PGF) process, in which two analysis methods may be used: (i) identifying open charm events or (ii) selecting events with high-$p_{T}$ hadrons. The data used in the present work were collected by the COMPASS experiment, where a naturally polarised muon beam of 160 GeV, impinging on a polarised nucleon fixed target, is used. In the analyses a new weighted method based on a neural network approach is used. Preliminary results for the gluon polarisation from high-$p_{T}$ and open charm analyses are presented. The gluon polarisation result for high-$p_{T}$ hadrons is presented for $Q^{2}$ < 1 and $Q^{2}$ > 1 (GeV$/c$)$^{2}$ regimes and divided, for the first time, into 3 statistically independent bins at LO ($Q^{2}$ > 1 $($GeV$/c)^{2}$). The result from open charm analysis is obtained at LO and NLO.