18-22 October 2021
Matsue, Shimane Prefecture, Japan
Asia/Tokyo timezone

J/psi spin asymmetry measurements in p+p collisions at 200 and 510 GeV by the PHENIX experiment at RHIC

22 Oct 2021, 07:50
Room 501 (Kunibiki Messe)

Room 501

Kunibiki Messe

Parallel Session Presentation Nucleon Helicity Structure Nucleon Helicity Structure


alexandre lebedev (Iowa State University)


Studies of heavy quark bound states, like J/psi meson, provide a useful tool to investigate QCD properties. Many general features of J/psi production, such as cross-sections and transverse momentum distributions are well described by many existing models. In order to differentiate between various theoretical models one has to study J/psi production in more details. One of the observables which can be used for this purpose is angular distribution of leptons produced in quarkonium decays, usually called polarization or spin asymmetry.
The PHENIX experiment at RHIC has measured inclusive J/psi polar and azimuthal angular decay coefficients at the mid (|y|<0.35) and forward (1.2<|y|<2.2) rapidity in p+p collisions at 200 GeV and 510 GeV. In this talk the analysis details as well as the results in different polarization frames will be presented and compared to theory.

Primary author

alexandre lebedev (Iowa State University)

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