Double-Spin Asymmetry of J/psi Production in Polarized pp Collisions at HERA-$\vec N$

Details Double-Spin Asymmetry of J/psi Production in Polarized pp Collisions at HERA-$\vec N$ Double-Spin Asymmetry of J/psi Production in Polarized pp Collisions at HERA-$\vec N$

1996-12-09

arxiv.org/abs/hep-ph/9612301v3

Phys.Rev. D56 (1997) 7331-7340

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages with 6 figures (epsfig), LaTeX; Some figures are changed and misprint is corrected

Scientific paper

10.1103/PhysRevD.56.7331

We calculated the color-octet contribution to the double spin asymmetry of $J/\psi$ hadroproduction with nonzero transverse momenta at fixed target energies $\sqrt{s}\simeq40$ 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-$\vec N$ should allow one to distinguish between different parametrizations for the polarized gluon distribution in the proton.

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