  The BRAHMS experiment at RHIC has measured the transverse single spin
asymmetries in polarized pp induced pion production at RHIC. The results from
the RHIC run-5 shows a significant asymmetry for pi+ and pi- at moderate xF.
The trend of the data is in agreement with lower energy results while the
absolute values are surprisingly large. The pT dependence is approximately
inversely propotional to pT in agreement with the pQCD expectations.
