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arXiv 2308.00567nucl-th
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多相输运模型中相对论重离子碰撞部分相干源的双π干涉学

Two-pion interferometry for partially coherent sources in relativistic heavy-ion collisions in a multi-phase transport model

Shi-Yao Wang, Jun-Ting Ye, Wei-Ning Zhang

AI总结:

本研究基于AMPT模型开展相对论重离子碰撞部分相干源的双π HBT干涉学研究,引入纵、横向相干发射长度,验证了部分相干源的HBT结果比混沌源更贴合不同能量下的重离子碰撞实验数据。

摘要:

我们采用多相输运(AMPT)模型,对相对论重离子碰撞中部分相干的π介子发射源开展双π Hanbury Brown-Twiss(HBT)干涉学研究。在计算部分相干源的HBT关联函数时,我们在π介子产生坐标中引入了纵向相干发射长度与横向相干发射长度。我们将有无相干发射条件的模型结果,分别与质心系能量$\boldsymbol{\backslash sqrt\brace s_{NN}}$=200 GeV的金-金(Au-Au)碰撞、以及质心系能量$\boldsymbol{\backslash sqrt\brace s_{NN}}$=2.76 TeV的铅-铅(Pb-Pb)碰撞实验数据对比,发现部分相干源的HBT结果比混沌源的结果更贴合实验数据。

英文摘要:

We perform two-pion Hanbury Brown-Twiss (HBT) interferometry for the partially coherent pion-emitting sources in relativistic heavy-ion collisions, using a multi-phase transport (AMPT) model. A longitudinal coherent emission length, as well as a transverse coherent emission length, are introduced to the pion generation coordinates in calculating the HBT correlation functions of the partially coherent sources. We compare the model results with and without coherent emission conditions with experimental data in Au-Au collisions at center-of-mass energy $\sqrt{s_{NN}}=$200 GeV, and in Pb-Pb collisions at center-of-mass energy $\sqrt{s_{NN}}=$2.76 TeV, and find that the HBT results of the partially coherent sources are closer to the experimental data than those of chaotic sources.

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