Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-09-02
Phys.Rev.D61:114013,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
14pages, 6 PS figures
Scientific paper
10.1103/PhysRevD.61.114013
Presented here is a calculation of inelastic $J/\psi$ production in polarized photon-hadron collisions under the framework of NRQCD factorization formalism. We consider the photoproduction of $\jpsi$ in the energy range relevant to HERA. The Weizs\"acker-Williams approximation is adopted in the evaluation of the cross sections for $ep$ collisions. We found that this process can give another independent test for the color-octet mechanism, and the different features for the two color-octet processes may provide further informations on the mechanism for inelastic $\jpsi$ photoproduction. And the discrepancy on the production asymmetry $A$ between various sets of polarized gluon distribution functions is also found to be distinctive.
Chao Kuang-Ta
Dong Hui-Shi
Hao Li-Kun
Yuan Fang-Fang
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