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Pushing forward jet substructure measurements in heavy-ion collisions

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arxiv 2210.07901 v1 pith:2JF5NXGD submitted 2022-10-14 hep-ph hep-exnucl-exnucl-th

Daniel Pablos , Alba Soto-Ontoso This is my paper · ORCID
classification hep-phhep-exnucl-exnucl-th
keywords heavy-ioncollisionsjetssubstructurebiasescolordecoherenceforward
verification ladder T0 review T1 audit T2 compute T3 formal
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Energetic jets that traverse the quark-gluon plasma created in heavy-ion collisions serve as excellent probes to study this new state of deconfined QCD matter. Presently, however, our ability to achieve a crisp theoretical interpretation of the crescent number of jet observables measured in experiments is hampered by the presence of selection biases. The aim of this work is to minimise those selection biases associated to the modification of the quark- vs. gluon-initiated jet fraction in order to assess the presence of other medium-induced effects, namely color decoherence, by exploring the rapidity dependence of jet substructure observables. So far, all jet substructure measurements at mid-rapidity have shown that heavy-ion jets are narrower than vacuum jets. We show both analytically and with Monte Carlo simulations that if the narrowing effect persists at forward rapidities, where the quark-initiated jet fraction is greatly increased, this could serve as an unambiguous experimental observation of color decoherence dynamics in heavy-ion collisions.

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Forward citations

Cited by 5 Pith papers

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

  1. Visualizing How the Structure of Large-Radius Jets Shapes Their Wakes

    hep-ph 2025-01 conditional novelty 7.0 of 10

    Hybrid Model simulations show ATLAS large-radius jet data rule out fully coherent jet energy loss, and low-pT jet-shape observables can visualize merging subjet wakes.

  2. Measurement of forward jet suppression in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$$ TeV with the ATLAS detector

    nucl-ex 2026-08 accept novelty 6.0 of 10

    First measurement of jet suppression at forward rapidity in heavy-ion collisions shows strong centrality-dependent suppression of jet yields.

  3. An Equilibrating Parton Shower for Jet Quenching and Medium Response

    hep-ph 2026-07 conditional novelty 6.0 of 10

    A parton shower derived from QCD effective kinetic theory reproduces the full linearized Boltzmann equation and generates jet wakes, Mach-cone-like structures, and two-particle correlations.

  4. Constraining the Resolution Length of Quark-Gluon Plasma with New Jet Substructure Measurements

    hep-ph 2025-09 conditional novelty 6.0 of 10

    Jet substructure measurements from ALICE and ATLAS, modeled with the Hybrid Model, disfavor both fully coherent and fully incoherent energy loss, implying a finite QGP resolution length near 1/(pi T).

  5. Secondary Lund jet plane as a gluon enriched sample

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Selecting close, asymmetric dijets at the LHC gives a ~90% gluon-enriched subleading jet sample, supported by fixed-order QCD and Monte Carlo.

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