Radiative energy loss of neighboring subjets

Abstract

We compute the in-medium energy loss probability distribution of two neighboring subjets at leading order, in the large-$N_c$ approximation. Our result exhibits a gradual onset of color decoherence of the system and accounts for two expected limiting cases. When the angular separation is smaller than the characteristic angle for medium-induced radiation, the two-pronged substructure lose energy coherently as a single color charge, namely that of the parent parton. At large angular separation the two subjets lose energy independently. Our result is a first step towards quantifying effects of energy loss as a result of the fluctuation of the multi-parton jet substructure and therefore goes beyond the standard approach to jet quenching based on single parton energy loss. We briefly discuss applications to jet observables in heavy-ion collisions.

34 pages, 15 figures

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Cited by in corpus (16)

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• The Present and Future of QCD
• Nuclear modification factors for jet fragmentation
• Mapping collinear in-medium parton splittings
• Quenching effects in the cumulative jet spectrum
• Jet thermalization in QCD kinetic theory
• Precise description of medium-induced emissions
• Radiative corrections to the jet quenching parameter in dilute and dense media
• Wilson line correlators beyond the large-$N_c$
• Higher-order corrections to heavy-quark jet quenching
• Inconsistencies in, and short pathlength correction to, $R_{AA}(p_T)$ in $\mathrm{A}+\mathrm{A}$ and $\mathrm{p}+\mathrm{A}$ collisions
• Jet evolution in a dense QCD medium
• In-medium gluon radiation spectrum with all-order resummation of multiple scatterings in longitudinally evolving media
• Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence
• Partonic transport model application to heavy flavor