Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs
| dc.creator | COMPASS Collaboration | |
| dc.creator | Ageev, E. S. | |
| dc.date | 2005-11-10 | |
| dc.date.accessioned | 2026-07-07T11:26:34Z | |
| dc.date.available | 2026-07-07T11:26:34Z | |
| dc.description | We present a determination of the gluon polarization Delta G/G in the nucleon, based on the helicity asymmetry of quasi-real photoproduction events, Q^2<1(GeV/c)^2, with a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarized muon beam scattered on a polarized 6-LiD target. The helicity asymmetry for the selected events is <A_||/D> = 0.002 +- 0.019(stat.) +- 0.003(syst.). From this value, we obtain in a leading-order QCD analysis Delta G/G=0.024 +- 0.089(stat.) +- 0.057(syst.) at x_g = 0.095 and mu^2 =~ 3 (GeV}/c)^2. | |
| dc.description | 10 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0511028 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0511028 | |
| dc.identifier | Phys.Lett.B633:25-32,2006 | |
| dc.identifier | doi:10.1016/j.physletb.2005.11.049 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195868 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs | |
| dc.type | text |