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arXiv · 1902.00729

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

Feng-Chu Zhou·Guo-Liang Ma·Yu-Gang Ma
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Abstract

Within a multi-phase transport model with string melting scenario, jet transport parameter $\hat{q}$ is calculated in Au+Au collisions at $\sqrt{s_{NN} } $= 200 GeV and Pb+Pb collisions at $\sqrt{s_{NN} } $= 2.76 TeV. The $\hat{q}$ increases with the increasing of jet energy for both partonic phase and 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 mainly investigated, which discloses that a larger $\hat{q}$ corresponds to a larger $A_{J}$. It supports a consistent jet energy loss picture from the two viewpoints of single jet and dijet. It is proposed to measure dijet asymmetry distributions with different jet transport parameter ranges as a new potential method to study jet quenching physics in high energy heavy-ion collisions.

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Feng-Chu Zhou, Guo-Liang Ma, Yu-Gang Ma. 2019-02-02. Extracting jet transport parameter $\hat{q}$ from a multiphase transport model. https://doi.org/10.1140/epja/s10050-020-00043-w

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