Gluon Sivers Function and Single Spin Asymmetry in $e+p^\uparrow \rightarrow e+J/ψ+ X$

preprint2012arXivOpen access

We propose measurement of transverse single spin asymmetry (SSA) in charmonium production as a probe of gluon Sivers function. We estimate SSA in low virtuality electroproduction of $J/ψ$ using color evaporation model of charmonium production and existing models of the gluon Sivers function and find sizable asymmetry at JLab, HERMES, COMPASS and eRHIC energies.

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Gluon Sivers Function and Single Spin Asymmetry in $e+p^\uparrow \rightarrow e+J/ψ+ X$

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Gluon Sivers Function and Single Spin Asymmetry in e+p↑→e+J/ψ+Xe+p^\uparrow \rightarrow e+J/ψ+ Xe+p↑→e+J/ψ+X

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Gluon Sivers Function and Single Spin Asymmetry in $e+p^\uparrow \rightarrow e+J/ψ+ X$