Abstract
The double longitudinal-spin asymmetry, ALL, of the J/ψ production in polarized proton-proton collisions is presented in this paper at QCD next-to-leading order. It is found that the obtained values of ALL are in general consistent with the PHENIX measurements. Various sets of the long-distance matrix elements (LDMEs) are employed in our calculation to study the possible theoretical uncertainties. It is found that, for pt < 5 GeV, all these LDMEs lead to almost the same results, which are within the tolerance of the experimental data uncertainties.
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Feng, Y., Zhang, HF. Double longitudinal-spin asymmetries in J/ψ production at RHIC. J. High Energ. Phys. 2018, 136 (2018). https://doi.org/10.1007/JHEP11(2018)136
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DOI: https://doi.org/10.1007/JHEP11(2018)136