Quarkonium production and polarization: where do we stand?

We review the current status of heavy quarkonium production phenomenology based on nonrelativistic effective field theories, focusing on spintriplet S -wave states such as J/ψ, ψ (2 S ), and ϒ. We present some representative examples for heavy quarkonium production mechanisms proposed in the literat...

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Bibliographic Details
Published in:EPJ Web of conferences 2022, Vol.274, p.1011
Main Author: Chung, Hee Sok
Format: Article
Language:English
Subjects:
Phenomenology
Polarization
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Summary:We review the current status of heavy quarkonium production phenomenology based on nonrelativistic effective field theories, focusing on spintriplet S -wave states such as J/ψ, ψ (2 S ), and ϒ. We present some representative examples for heavy quarkonium production mechanisms proposed in the literature, which vary significantly depending on the choice of data employed in analyses. We then discuss the rôle of polarization in discriminating between the different possible scenarios for quarkonium production. Other observables that may be useful in pinpointing the production mechanism are also introduced, such as the η c production, associated production of J/ψ plus a gauge boson, and J/ψ production at the Electron-Ion Collider.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/202227401011