Publication
Leading order determination of the gluon polarisation from DIS events with high-$p_T$ hadron pairs
| dc.contributor.author | COMPASS collaboration (216 authors) | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Nunes, A.S. | |
| dc.contributor.author | Quaresma, M. | |
| dc.contributor.author | Quintans, C. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.contributor.author | Stolarski, M. | |
| dc.date.accessioned | 2019-02-03T18:59:46Z | |
| dc.date.available | 2019-02-03T18:59:46Z | |
| dc.date.issued | 2013-01-08 | |
| dc.date.updated | 2019-02-03T18:59:45Z | |
| dc.description.abstract | We present a determination of the gluon polarisation Delta g/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events 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/c polarised muon beam scattering off a polarised ^6LiD target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction x_g covering the range 0.04 < x_g < 0.27. The values obtained at leading order in QCD do not show any significant dependence on x_g. Their average is Delta g/g = 0.125 +/- 0.060 (stat.) +/- 0.063 (syst.) at x_g=0.09 and a scale of mu^2 = 3 (GeV/c)^2. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B718 (2013) 922-930; DOI 10.1016/j.physletb.2012.11.056 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2012.11.056 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26105 | |
| dc.language.iso | eng | |
| dc.title | Leading order determination of the gluon polarisation from DIS events with high-$p_T$ hadron pairs | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |