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Origins of the di-jet asymmetry in heavy ion collisions

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arxiv 1512.08107 v2 pith:L3LXY4EF submitted 2015-12-26 hep-ph nucl-exnucl-th

Origins of the di-jet asymmetry in heavy ion collisions

classification hep-ph nucl-exnucl-th
keywords asymmetrycollisionsdi-jetheavydiscussfluctuationsobservableproton-proton
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The di-jet asymmetry --- the measure of the momentum imbalance in a di-jet system --- is a key jet quenching observable. Using the event generator \jewel we show that the di-jet asymmetry is dominated by fluctuations both in proton-proton and in heavy ion collisions. We discuss how in proton-proton collisions the asymmetry is generated through recoil and out-of-cone radiation. In heavy ion collisions two additional sources contribute to the asymmetry, namely energy loss fluctuations and differences in path length. The latter is shown to be a sub-leading effect. We discuss the implications of our results for the interpretation of this observable.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Modification of jet-energy flow in heavy-ion collisions

    nucl-ex 2026-06 accept novelty 8.0

    ALICE measures the radial jet-energy flow observable Δp_T in Pb-Pb (5.02 TeV) and pp (13 TeV) collisions and reports narrowing of the energy distribution in heavy-ion collisions at 3.5-4.5σ significance.

  2. Observation of centrality-dependent dijet transverse momentum imbalance in O+O and Ne+Ne collisions at $\sqrt{s_{NN}}$ = 5.36 TeV with the ATLAS detector

    nucl-ex 2026-06 unverdicted novelty 6.0

    ATLAS observes increasing dijet imbalance with centrality in O+O and Ne+Ne collisions at 5.36 TeV, consistent with medium-induced energy loss in small systems.