Double-Spin Asymmetry in the Cross Section for Exclusive rho^0 Production in Lepton-Proton Scattering
| dc.creator | HERMES Collaboration | |
| dc.creator | Airapetian, A. | |
| dc.date | 2001-02-19 | |
| dc.date.accessioned | 2026-07-07T13:03:48Z | |
| dc.date.available | 2026-07-07T13:03:48Z | |
| dc.description | Evidence for a positive longitudinal double-spin asymmetry <A_1^rho> = 0.24 +-0.11 (stat) +-0.02 (syst) in the cross section for exclusive diffractive rho^0(770) vector meson production in polarised lepton-proton scattering was observed by the HERMES experiment. The longitudinally polarised 27.56 GeV HERA positron beam was scattered off a longitudinally polarised pure hydrogen gas target. The average invariant mass of the photon-proton system has a value of <W> = 4.9 GeV, while the average negative squared four-momentum of the virtual photon is <Q^2> = 1.7 GeV^2. The ratio of the present result to the corresponding spin asymmetry in inclusive deep-inelastic scattering is in agreement with an early theoretical prediction based on the generalised vector meson dominance model. | |
| dc.description | 10 pages, 4 embedded figures, LaTeX | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0102037 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0102037 | |
| dc.identifier | Phys.Lett.B513:301-310,2001 | |
| dc.identifier | doi:10.1016/S0370-2693(01)00639-6 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/226939 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Double-Spin Asymmetry in the Cross Section for Exclusive rho^0 Production in Lepton-Proton Scattering | |
| dc.type | text |