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QCD jets in a hot and dense medium: a study of shower formation time and collision kernels

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arxiv 2407.19966 v1 pith:6VH7RQ4E submitted 2024-07-29 hep-ph nucl-th

Rouzbeh Modarresi-Yazdi , Shuzhe Shi , Charles Gale , Sangyong Jeon This is my paper · ORCID
classification hep-phnucl-th
keywords chargedcollisiondifferencesformationfragmentationjetskernelsleading
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

With the use of MARTINI, a model which considers evolving QCD jets against a fluid dynamical background, it is shown that the introduction of formation time to the parton shower after the initial hard scattering is essential for a simultaneous description of charged hadron and jet $R_{AA}$. This inclusion also improves jet shape ratio at small angle and jet fragmentation function ratios of leading charged hadrons. The MARTINI framework is then aimed at a study of the leading order, next-to-leading-order, and non perturbative collision kernels. Sizable differences in the modification of jet substructure observables, i.e., jet shape and fragmentation functions are observed. Such differences are caused by the difference in the radiation rates of relatively soft gluons that survive in the evolution in medium.

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Cited by 3 Pith papers

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

  1. Jet broadening and radiation in the early anisotropic plasma in heavy-ion collisions

    hep-ph 2025-09 conditional novelty 7.0 of 10

    The full angle-dependent jet-medium collision kernel is extracted from QCD kinetic theory for the pre-equilibrium plasma, revealing strong early-time anisotropy and up to 300% error in the isotropic splitting rates us...

  2. A simple model to investigate jet quenching and correlated errors for centrality-dependent nuclear-modification factors in relativistic heavy-ion collisions

    nucl-th 2024-12 accept novelty 6.0 of 10

    A simple two-parameter jet energy-loss model can describe centrality-dependent jet suppression measurements, but the inferred formation time depends on the assumed path-length scaling and on how systematic errors are ...

  3. Hard Photon Triggered Jets in $p$-$p$ and $A$-$A$ Collisions

    hep-ph 2024-12 conditional novelty 5.0 of 10

    The multistage JETSCAPE model postdicts photon-triggered jet suppression and correlations at RHIC and LHC when bremsstrahlung photons are included, without any new parameter tuning.

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