Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-09-03
Physics
Nuclear Physics
Nuclear Experiment
Scientific paper
Measuring the single transverse spin asymmetry $A_N$ for large $x_F$ Drell-Yan production provides the most robust test of our current theoretical understanding of transverse proton spin structure. This includes a measurement of the predicted sign change of the Sivers function in comparison to that found in SIDIS data. The first year of a feasibility test has been completed to define the requirements for measuring large $x_F$ Drell-Yan production at RHIC. The impact of colliding beams at a third IR at RHIC was found to be negligible and a rich jet-triggered data sample was acquired by AnDY in RHIC Run 11. Plans for subsequent runs are currently underway.
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