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Extracting jet transport parameter \(\hat{q}\) from a multiphase transport model

  • Regular Article –Theoretical Physics
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Abstract

Within a multiphase transport model with a string-melting scenario, the jet transport parameter \(\hat{q}\) is extracted in Au+Au collisions at \(\sqrt{s_{NN} } \)= 200 GeV and Pb+Pb collisions at \(\sqrt{s_{NN} } \)= 2.76 TeV. The jet transport parameter \(\hat{q}\) is a key parameter in jet-quenching phenomena, which depends not only on the temperature of the QCD medium but also on jet energy. We observe that \(\hat{q}\) increases with increasing of the jet energy for both the partonic phase and the hadronic phase. The energy and path length dependences of \(\hat{q}\) in full heavy-ion evolution are consistent with the expectations of jet quenching. The correlation between jet transport parameter \(\hat{q}\) and dijet transverse momentum asymmetry \(A_J\) is investigated. It is interesting to find that dijets with larger \(A_J\) have larger length-averaged \(\hat{q}\) values. Our study suggests that dijets with different \(A_J\) values can provide versatile tools for studying jet quenching and extracting jet transport parameters.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: This is a theoretical study and no experimental data has been listed.]

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Acknowledgements

F.-C.Z. is grateful to the Shanghai Institute of Applied Physics for its hospitality. F.-C.Z. is supported by the National Natural Science Foundation of China under Grant No. 11447203, the Science and Technology Department of Guizhou Province Fund under Grant No. 20147053, and the Doctoral Research Fund of Guizhou Normal University. G.-L.M. and Y.-G.M. are supported by the National Natural Science Foundation of China under Grants Nos. 11890710, 11835002,11961131011, 11421505, 11522547, and 11375251, the Key Research Program of the Chinese Academy of Sciences under Grant No. XDPB09.

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Authors and Affiliations

  1. School of Physics and Electronic Science, Guizhou Normal University, Guiyang, 550001, China

    Feng-Chu Zhou

  2. Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai, 200433, China

    Guo-Liang Ma & Yu-Gang Ma

  3. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Guo-Liang Ma & Yu-Gang Ma

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  1. Feng-Chu Zhou
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Correspondence to Guo-Liang Ma.

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Zhou, FC., Ma, GL. & Ma, YG. Extracting jet transport parameter \(\hat{q}\) from a multiphase transport model. Eur. Phys. J. A 56, 70 (2020). https://doi.org/10.1140/epja/s10050-020-00043-w

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