Double-Spin Asymmetry of J/psi Production in Polarized pp Collisions at HERA- N
Abstract
We calculated the color-octet contribution to the double spin asymmetry of J/ hadroproduction with nonzero transverse momenta at fixed target energies s40 GeV. It is shown that the color-octet contribution is dominant in the asymmetries. The expected asymmetries and statistical errors in a future option of HERA with longitudinally polarized protons at HERA- N should allow one to distinguish between different parametrizations for the polarized gluon distribution in the proton.
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