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Coalescence has long been used to describe the production of light(anti-)nuclei in heavy ion collisions. The same underlying mechanism may alsoexist in jets when a proton and a neutron are close enough in phase space toform a deuteron. We model deuteron production in jets by applying anafterburner to protons and neutrons produced in PYTHIA for $p$+$p$ collisionsat a center of mass energy $\sqrt{s} =$ 7 TeV. PYTHIA provides a reasonabledescription of the proton spectra and the shape of the deuteron spectrumpredicted by the afterburner is in agreement with the data. We show that therise in the coalescence parameter $B_2$ with momentum observed in data isconsistent with coalescence in jets. We show that di-hadron correlations can beused to separate the contributions from the jet and the underlying event. Thismodel predicts that the conditional coalescence parameter in the jet-likecorrelation should be independent of the trigger momentum.

Methods for separation of deuterons produced in the medium and in jets in high energy collisions