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The first measurement of the sea quark Sivers function is not SpinQuest but has been performed by the Star collaboration at RHIC using W/Z boson production . rather than Drell-Yan. https://arxiv.org/pdf/1511.06003.pdf
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The first measurement of the sea quark Sivers function is not SpinQuest but has been performed by the Star collaboration at RHIC using W/Z boson production . rather than Drell-Yan. https://arxiv.org/pdf/1511.06003.pdf
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