The angular distributions of muons from Upsilon(nS)-->
mu+mu-decays are measured using data from $p\overline p$ collisions at
sqrt(s)ÿ96 TeV corresponding to an integrated luminosity of 6.7/fb and
collected with the CDF II detector at the Fermilab Tevatron. This analysis
is the first to report the full angular distributions as functions of
transverse momentum pT for the Upsilon mesons in both the Collins-Soper
and s-channel helicity frames. This is also the first measurement of
spi+n alignment of Upsilon(3S) mesons. Within the kinematic range
of Upsilon rapi+dity |y|<0.6 and pT up to 40 GeV/c,the angular
distributions are found to be are nearly isotropi+c.
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Updated: Wednesday, 2011 December 28 15:08:38 CST automatically from input from "Stephanie A. Schuler"