Physical Review Letters, vol.108, no.8, 2012 (SCI-Expanded)
The ALICE Collaboration has studied J production in pp collisions at =7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J polarization parameters and were obtained. The study was performed in the kinematic region 2.5< y <4, 2