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Published byAngelica Skinner Modified over 9 years ago
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A Fundamental Test of Universality: Transverse Spin Drell Yan at RHIC vs Sivers Asymmetry in Deep Inelastic Scattering Important test at RHIC of recent fundamental QCD predictions for the Sivers effect, demonstrating… attractive vs repulsive color charge forces ---------------- Possible access to quark orbital angular momentum Requires very high luminosity (RHIC II) Both STAR and PHENIX can make important, exciting, measurements Discussion available at http://spin.riken.bnl.gov/rsc/
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DIS: attractiveDrell-Yan: repulsive Attractive vs Repulsive “Sivers” Effects Unique Prediction of Gauge Theory ! Sivers = Dennis Sivers (predicted orbital angular momentum origin of transverse asymmetries)
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0.1 0.2 0.3 x Sivers Amplitude 0 0 Experiment SIDIS vs Drell Yan: Sivers| DIS = − Sivers| DY *** Probes QCD attraction and QCD repulsion *** HERMES Sivers ResultsRHIC II Drell Yan Projections Markus Diefenthaler DIS Workshop Munich, April 2007
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