The extent to which J/psi mesons are accompanied by other particles within the same jet provides information about how the J/psi is formed, which is still not completely understood. The details of J/psi production may have important consequences for their interaction with the quark-gluon plasma. We present a study of jets containing a J/psi in pp collisions at 5 TeV with the CMS experiment. The fraction of the jets momentum carried by the J/psi is compared to models.
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