Summary

• High pT η measured in the range pT» 2—12 GeV/c in p+p, d+Au, and Au+Au collisions at √s = 200 GeV.

• p+p:

• - η/πo ~0.48 consistent with 0.46 “world ratio” in hadronic colls.

• - “mT scaling” hypothesis not exact for eta's below ~2 GeV/c

• d+Au:

• - No (or small) “Cronin effect” (RdA~1 for all centralities within uncertainties).

• Au+Au:

  • - Factor x5 suppression in central (0-20%) colls.