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Medium modifications of photon-tagged jet fragmentation function in high-energy heavy-ion collisions
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abstract
Based on a multiphase transport model, medium modifications of prompt photon-tagged jet fragmentation function are investigated by comparing prompt photon-tagged hadron azimuthal correlation in Au+Au collisions (0-40\%) with that in p+p collisions at $\sqrt{s_{_{\rm NN}}}$ = 200 GeV. The measured modification factor, $I_{AA}$, increases with the increasing integration range of the away side, which reveals a medium-modified jet shape in which the medium enhancement of soft particles is preferentially located far away from the jet axis. The $I_{AA}$ largely results from strong interactions between jets and partonic matter. However, both hadronization of coalescence and hadronic rescatterings play certain roles to modify the $I_{AA}$. These behaviors reflect a dynamical evolution of modifications of the prompt photon-tagged jet fragmentation function in high-energy heavy-ion collisions.
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Cited by 1 Pith paper
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Probing jet-medium interactions via jet substructure observables in relativistic heavy-ion collisions
In the AMPT model, the medium-induced enhancement of the groomed jet mass at high Mg/pT in PbPb collisions comes from large-angle elastic scattering during the parton cascade, not from hadronization.
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