Production of Charmonium and Jets in Ultrarelativistic Proton–Proton Collisions
Production of J/ψ–meson in association with jet in proton–proton collisions is studied at energy s1/2 = 8 TeV. Jet pair production at s1/2 = 7 TeV is considered briefly. Event generator Pythia 8 is employed in the simulations of the reactions. Distributions that depend on differences of transverse momenta, rapidities ymj, and azimuthal angles φmj of the meson and jet are calculated. It is analyzed, how gluon radiation in initial and final states of the partonic processes along with multiple parton interactions influence the observables. Shapes of (ymj, φmj, yJ/ψ)– and (ymj, pT J/ψ, yJ/ψ)–distributions, with pT J/ψ (yJ/ψ) being momentum (rapidity) of J/ψ, are shown to differ substantially for the mesons, emitted in the central and forward regions. The observables, measurements of which will help to impose severe constraints on used models, are discussed.
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