Abstract
The ALICE Collaboration has studied production in collisions at at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the polarization parameters and were obtained. The study was performed in the kinematic region , , in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.
- Received 8 November 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.082001
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© 2012 CERN, for the ALICE Collaboration