Measurement of the Spin Asymmetry in the Photoproduction of Pairs of High-pT Hadrons at HERMES
| dc.creator | Airapetian, A. | |
| dc.date | 1999-07-14 | |
| dc.date.accessioned | 2026-07-07T13:03:50Z | |
| dc.date.available | 2026-07-07T13:03:50Z | |
| dc.description | We present a measurement of the longitudinal spin asymmetry A_|| in photoproduction of pairs of hadrons with high transverse momentum p_T. Data were accumulated by the HERMES experiment using a 27.5 GeV polarized positron beam and a polarized hydrogen target internal to the HERA storage ring. For h+h- pairs with p_T^h_1 > 1.5 GeV/c and p_T^h_2 > 1.0 GeV/c, the measured asymmetry is A_|| = -0.28 +/- 0.12 (stat.) +/- 0.02 (syst.). This negative value is in contrast to the positive asymmetries typically measured in deep inelastic scattering from protons, and is interpreted to arise from a positive gluon polarization. | |
| dc.description | 5 pages (latex), 4 figures (eps) | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9907020 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9907020 | |
| dc.identifier | Phys.Rev.Lett.84:2584-2588,2000 | |
| dc.identifier | doi:10.1103/PhysRevLett.84.2584 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/226950 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the Spin Asymmetry in the Photoproduction of Pairs of High-pT Hadrons at HERMES | |
| dc.type | text |