The 11th workshop of the APS Topical Group on Hadronic Physics

Production and polarization of direct $J/\psi$ in $e+p$ collisions in the improved color evaporation model

Mar 16, 2025, 9:50 AM

25m

parallel Parallel Session - Room 4

Speaker

Vincent Cheung (Lawrence Livermore National Laboratory)

Description

One of the best ways to understand hadronization in QCD is to study the production of quarkonium. The color evaporation model (CEM) and Nonrelativistic QCD (NRQCD) can describe production yields rather well but spin-related measurements like the polarization are stronger tests. In this talk, we will present the first expansion of the improved CEM into electron-proton collisions, and the predictions of $J/\psi$ production and polarization in the future Electron-Ion Collider.