$J/\psi$ production and polarization within a jet

Abstract

We study the production and polarization of $J/\psi$ mesons within a jet in proton-proton collisions at the LHC. We define the $J/\psi$-jet fragmentation function as a ratio of differential jet cross sections with and without the reconstructed $J/\psi$ in the jet. We demonstrate that this is a very useful observable to help explore the $J/\psi$ production mechanism, and to differentiate between different NRQCD global fits based on inclusive $J/\psi$ cross sections. Furthermore, we propose to measure the polarization of $J/\psi$ mesons inside the jet, which can provide even more stringent constraints for the heavy quarkonium production mechanism.

5 pages, 3 figures, published version

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• Spin asymmetries in electron-jet production at the future electron ion collider
• Jet fragmentation functions for $Z$-tagged jets
• Quark fragmentation as a probe of dynamical mass generation
• Exploring $J/\psi$ production mechanism at the future Electron-Ion Collider
• Charmonium Triangular Flow in High Energy Nuclear Collisions
• Shedding Light on Hadronization by Quarkonium Energy Correlator
• Hadron-in-jet production at partonic threshold
• Fragmentation function of $g\to Q\bar{Q}{(}^3{S}_1^{[8]})$ in soft gluon factorization and threshold resummation
• Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO${}^{+}$
• Resummation of threshold double logarithms in hadroproduction of heavy quarkonium
• Polarization and cross section of midrapidity J/$\psi$ production in proton-proton collisions at $\sqrt{s}=510$ GeV
• Quarkonium Polarization and the Long Distance Matrix Elements Hierarchies using Jet Substructure
• Comments on "Study of $J/\psi$ production in jets"
• Semi-Inclusive Jet Functions and Jet Substructure in $J_{E_T}^{(I)}$ and $J_{E_T}^{(II)}$ Algorithms