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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.00070 |
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Table of Contents:
- We calculate the production and polarization of direct $J/ψ$ in the improved color evaporation model in $e+p$ photoproduction. We present the production as functions of transverse momentun, mass of the hadronic final state, and inelasticity. We also present the polarization parameters $λ_\vartheta$, $λ_φ$, and $λ_{\vartheta φ}$ in the helicity and the Collins-Soper frames, as well as the frame-invariant polarization parameter $\tildeλ$ as a function of transverse momentum and inelasticity. We find agreement with both $J/ψ$ unpolarized cross sections and the invariant polarization parameters as a function of $p_T$.