Measurement of Upsilon Polarization at CDF

The production polarization for Upsilon(1S), (2S), and (3S) mesons has been measured in dimuon events from p-pbar collisions at 1.96 TeV, using the CDF detector at the Tevatron. The measurement is conducted over a pT range of 2-40 GeV/c using data corresponding to an integrated luminosity of 4.8 fb-1.