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NUCLEAR PARTON DISTRIBUTION FUNCTIONS AND THEIR EFFECTS ON sin 2 µW ANOMALY

Nuclear parton distribution functions (NPDFs) are investigated by analyzing the data on structure functions F A 2 and Drell-Yan cross sections ae pA DY . An important point of this analysis is to show uncertainties of the NPDFs by the Hessian method. The analysis indicates that the uncertainties are large for antiquark distributions at x > 0.2 and gluon distributions in the whole x region. We also discuss a nuclear eect on the NuTeV sin 2 µW anomaly as an application.