Fragmentation of J/ψ in jets in pp collisions at √s = 5.02 TeV

Abstract

The fragmentation of jets containing a J/ψ meson is studied in √s = 5.02 TeV pp data using an integrated luminosity of L = 27.39pb^(−1). The fraction of the jet transverse momentum p_(T,jet) carried by the J/ψ is measured for prompt J/ψ and J/ψcoming from b hadron decays, named nonprompt. Whereas the fragmentation function of nonprompt J/ψ is well-modeled by simulations using a Monte Carlo generator, the prompt J/ψ are found to be accompanied by a larger level of jet activity. The fraction of J/ψ mesons that are produced inside a jet is also reported, and found to be larger in data than in simulation, for both prompt and nonprompt J/ψ.

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