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Towards detailed tomography of high energy heavy-ion collisions by $\gamma$-jet
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abstract
Within a multi-phase transport (AMPT) model with string melting scenario, the transverse momentum imbalance between prompt photon and jet is studied in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV. Jet loses more energy in more central collisions due to strong partonic interactions between jet parton shower and partonic matter, which is more significant than due to hadronic interactions only. The hadronization and final-state hadronic interactions have little influences on the imbalance. The imbalance ratio $x_{j\gamma}$ is sensitive to both production position and passing direction of $\gamma$-jet, which provides an opportunity to do detail $\gamma$-jet tomography on the formed partonic matter by selecting different $x_{j\gamma}$ ranges. It is also proposed that $\gamma$-hadron azimuthal correlation associated with photon+jet is a probe to see the medium responses to different $\gamma$-jet production configurations.
Forward citations
Cited by 1 Pith paper
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Probing medium response via strangeness enhancement around quenched jets
In the AMPT model, jet-induced medium excitation enhances the strange-to-non-strange hadron ratio around quenched jets in Pb+Pb collisions, increasing with centrality and radial distance.
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