Speaker
Marcin Stolarski
(Faculty of Physics - Warsaw University of Technology)
Description
A new COMPASS value of $\Delta G/G$, obtained from high transverse momentum hadrons pairs in the $Q^{2}>1$ (GeV/$c$)$^{2}$ region is presented. The statistical error of $\Delta G/G$ ($\approx 0.094$)
is reduced by a factor 3 in comparison to the previous analysis in the same kinematic region. The new measurement is based on a neural network approach using weighted events.
In addition the formula used for the extraction of $\Delta G/G$ has been updated and the contributions coming from the leading order or the QCD Compton processes are no longer neglected.
Finally the results obtained for the $Q^{2}<1$ (GeV/$c$)$^{2}$ region
are also presented.
Author
M Stolarski
(CERN)
