Color Octet Contribution to J/psi Photoproduction Asymmetries
| Autor: | George Japaridze, Avto Tkabladze, W.-D. Nowak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics octet [color] Octet High Energy Physics::Lattice inclusive reaction [lepton p] High Energy Physics::Phenomenology Nuclear Theory polarized beam [photon] FOS: Physical sciences nonrelativistic [quantum chromodynamics] electroproduction [J/psi(3100)] High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) photoproduction [J/psi(3100)] factorization inclusive reaction [photon p] ddc:530 polarized target [p] High Energy Physics::Experiment asymmetry [spin] numerical calculations Nuclear Experiment |
| Zdroj: | Physical review / D 62(3), 034022 (2000). doi:10.1103/PhysRevD.62.034022 |
| DOI: | 10.1103/PhysRevD.62.034022 |
| Popis: | We investigate $J/\psi$ photoproduction asymmetries in the framework of the NRQCD factorization approach. It is shown that the color octet contribution leads to large uncertainties in the predicted asymmetries which rules out the possibility to precisely measure the gluon polarization in the nucleon through this final state. For small values of the color octet parameters being compatible with $J/\psi$ photoproduction data it appears possible that a measurement of $J/\psi$ asymmetries could provide a new test for the NRQCD factorization approach, on one hand, or a measurement of the polarized gluon distribution from low inelasticity events $(z Comment: 10 pages, LaTeX, with 6 eps figs included with epsfig.sty |
| Databáze: | OpenAIRE |
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