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

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

2008-09-10

arxiv.org/abs/0809.1803v1

Physics

High Energy Physics

High Energy Physics - Experiment

On behalf of COMPASS Collaboration, DIS08 proc, 4 pages

Scientific paper

The new COMPASS Delta G/G result obtained from high transverse momentum hadron pairs in the Q^2>1 GeV^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.

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