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Process dependent Sivers function and implications for single spin asymmetry in inclusive hadron production
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abstract
We study the single transverse spin asymmetries in the single inclusive particle production within the framework of the generalized parton model (GPM). By carefully analyzing the initial- and final-state interactions, we include the process-dependence of the Sivers functions into the GPM formalism. The modified GPM formalism has a close connection with the collinear twist-3 approach. Within the new formalism, we make predictions for inclusive $\pi^0$ and direct photon productions at RHIC energies. We find the predictions are opposite to those in the conventional GPM approach.
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Cited by 1 Pith paper
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The gluon Sivers function and its process dependence from RHIC data
A combined analysis of RHIC pion and D-meson spin asymmetries yields first rough constraints on the two independent gluon Sivers functions in the CGI-GPM.
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