Understanding the J/psi Production Mechanism at PHENIX

Details Understanding the J/psi Production Mechanism at PHENIX Understanding the J/psi Production Mechanism at PHENIX

2011-07-07

arxiv.org/abs/1107.1293v1

Physics

Nuclear Physics

Nuclear Experiment

139 pages, 66 figures, Ph.D. thesis submitted to Iowa State University Sep 2010, DAI-B 72/03

Scientific paper

The large mass of the charm quark, along with the abundance of J/psi mesons observed from proton-proton collisions at PHENIX, allow for new measurements which are sensitive to basic properties of QCD. Two measurements are presented in this document: a transverse single-spin asymmetry (SSA) of J/psi production and the angular distribution for decay leptons in various reference frames. The decay distribution is directly sensitive to the J/psi production mechanism, while the transverse SSA is also sensitive to the distribution of gluons in a transversely polarized proton. Taken together, the two measurements provide a wealth of information about the formation of a J/psi meson.

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