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Mapping collinear in-medium parton splittings

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arxiv 1907.03653 v1 pith:36RQKXT4 submitted 2019-07-08 hep-ph nucl-th

classification hep-phnucl-th
keywords mediummodificationspartonsplittingscollinearformationin-mediuminside
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We map the spectrum of $1\to 2$ parton splittings inside a medium characterized by a transport coefficient $\hat q$ onto the kinematical Lund plane, taking into account the finite formation time of the process. We discuss the distinct regimes arising in this map for in-medium splittings, pointing out the close correspondence to a semi-classical description in the limit of hard, collinear radiation with short formation times. Although we disregard any modifications of the original parton kinematics in course of the propagation through the medium, subtle modifications to the radiation pattern compared to the vacuum baseline can be traced back to the physics of color decoherence and accumulated interactions in the medium. We provide theoretical support to vacuum-like emissions inside the medium by delimiting the regions of phase space where it is dominant, identifying also the relevant time-scales involved. The observed modifications are shown to be quite general for any dipole created in the medium.

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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. Finite Formation Time Antenna Radiation: Color Spectators Break Single-Emitter BDMPS-Z

    hep-ph 2026-07 conditional novelty 7.0 of 10

    Medium interactions during the finite formation time of a color-singlet q-qbar pair create spectator-leg correlations that make the direct gluon-emission contribution deviate from the single-emitter BDMPS-Z spectrum.

  2. 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.

  3. Gluon radiation from a QCD antenna with realistic parton-medium interactions

    hep-ph 2026-07 unverdicted novelty 6.0 of 10

    The in-medium antenna gluon spectrum is obtained by numerical solution of Dyson-type equations that fully resum multiple scatterings for Yukawa and HTL rates, without harmonic-oscillator or opacity truncations.

  4. Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence

    hep-ph 2026-04 unverdicted novelty 6.0 of 10

    A quantum-circuit framework maps partonic cross-sections for multi-particle QCD processes in media, benchmarked on dipole formation and antenna radiation at leading order.

  5. 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).

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