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Effects of the formation time of parton shower on jet quenching in heavy-ion collisions

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arxiv 2208.13331 v2 pith:URT5XBCE submitted 2022-08-29 nucl-th hep-ph

Effects of the formation time of parton shower on jet quenching in heavy-ion collisions

Mengxue Zhang , Yang He , Shanshan Cao , Li Yi This is my paper
classification nucl-th hep-ph
keywords formationtimejetsquenchingwerecollisionseffectshard
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Jet quenching has successfully served as a hard probe to study the properties of Quark-Gluon Plasma (QGP). As a multi-particle system, jets take time to develop from a highly virtual parton to a group of partons close to mass shells. In this study, we present a systematical study on the effects of this formation time on jet quenching in relativistic nuclear collisions. Jets from initial hard scatterings were simulated with Pythia, and their interactions with QGP were described using a Linear Boltzmann Transport (LBT) model that incorporates both elastic and inelastic scatterings between jet partons and the thermal medium. Three different estimations of the jet formation time were implemented and compared, including instantaneous formation, formation from single splitting, and formation from sequential splittings, before which no jet-medium interaction was assumed. We found that deferring the jet-medium interaction with a longer formation time not only affects the overall magnitude of the nuclear modification factor of jets, but also its dependence on the jet transverse momentum.

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Cited by 2 Pith papers

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  1. Geometric Bias and Centrality Dependence of Jet Quenching in High-Energy Nuclear Collisions

    nucl-th 2026-04 unverdicted novelty 5.0

    A refined HIJING initial-condition model with geometric bias from impact-parameter effects, combined with Boltzmann jet transport, describes the centrality dependence of charged-hadron suppression in 5.02 TeV Pb+Pb co...

  2. Geometric Bias and Centrality Dependence of Jet Quenching in High-Energy Nuclear Collisions

    nucl-th 2026-04 conditional novelty 5.0

    Suppression of high-pT hadrons in peripheral Pb+Pb collisions is predominantly driven by initial-state geometric bias rather than final-state jet quenching.