Drell Yan Feasibility Study at IP2 L.C. Bland, BNL RSC Meeting, Iowa State U. 15 May 2010.

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3 Simple QED example: DIS: attractive Drell-Yan: repulsive Same in QCD: As a result: Attractive vs Repulsive Sivers Effects Unique Prediction of Gauge Theory ! Transverse Spin Drell-Yan Physics at RHIC (2007)