Measurement of $\Delta G/G$ from high transverse momentum hadron pairs in COMPASS

The new COMPASS $\Delta G/G$ result obtained from high transverse momentum hadron pairs in the $Q^{2}$ > 1 (GeV$/c$)$^{2}$ region is presented. Comparing to the previous analysis in this region the statistical error of $\Delta G/G$ is reduced by a factor 3 to 0.10. A weighted method of the $\Delta G/G$ measurement based on neural network approach is used. In addition, the formula for the $\Delta G/G$ extraction used in the analysis has been updated. The contributions coming from the leading order and QCD Compton processes are no longer neglected.