The suppression of J/ψ production caused by the color-screening effect in heavy-ion collisions is considered as an evidence of the creation of quark-gluon plasma. However, the production of J/ψ in hadronic collisions remains not fully understood. Further studies are needed to provide a good understanding of its production mechanism in p+p collisions for interpreting the observed suppression in heavy-ion collisions. Recently, the J/ψ production in jets was proposed as a useful observable to help

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... explore the J/ψ production mechanism and to differentiate various J/ψ production models. We report the measurement of the fraction of charged jet transverse momentum carried by the J/ψ meson, z(J/ψ) ≡ p