SPIN PHYSICS GOALS

• 2 months of spin physics running per year

  • 2 x 1032 cm-2 s-1 at ?s = 500 GeV, (800 pb-1)
  • 8 x 1031 cm-2 s-1 at ?s = 200 GeV, (320 pb-1)

• Gluon polarization ?G(x)

  • Via direct photons
  • But, also via J/? production

• Antiquark polarization ??q (x)

  • Via Drell-Yan

• Flavor decomposition via W+ , W?

  • u + ?d ? W+ ? ?+ ? ?
  • d + ?u ? W? ? ?? ? ??

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