Abstract
Abstract
The double longitudinal-spin asymmetry, A
LL
, 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 A
LL
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 p
t
< 5 GeV, all these LDMEs lead to almost the same results, which are within the tolerance of the experimental data uncertainties.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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