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arXiv 2403.02759nucl-thhep-ph
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相对论性重离子碰撞中利用鉴别强子和轻（反）原子核估算动力学温度和径向流速度：RHIC与LHC

Kinetic temperature and radial flow velocity estimation using identified hadrons and light (anti-)nuclei produced in relativistic heavy-ion collisions at RHIC and LHC

Junaid Tariq, M. U. Ashraf, Grigory Nigmatkulov

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11 pages, 6 figures, 4 Tables
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AI总结：

本研究利用Blast-Wave模型同时拟合RHIC和LHC重离子碰撞中强子与轻（反）原子核的横动量谱，提取动力学冻结温度与集体流速度，发现轻核参与集体膨胀且冻结参数随能量变化较弱。

摘要：

我们报告了在RHIC和LHC能量下相对论性重离子碰撞中鉴别强子（π±、K±和p(p̄)）以及轻（反）原子核d(d̄)、t(t̄)和³He的动力学冻结性质的研究。我们使用Blast-Wave（BW）模型对RHIC中Au+Au碰撞（√sNN = 7.7–200 GeV）和LHC中Pb+Pb碰撞（√sNN = 2.76 TeV）所产生的鉴别强子与轻（反）原子核的横动量（pT）谱进行了同时拟合。研究了冻结参数（即动力学冻结温度T_kin和集体流速度⟨β⟩）的能量和中心度依赖性。观察到当轻（反）原子核与轻强子共同拟合时，它们也参与了碰撞所产生介质的集体膨胀。与仅对轻强子拟合得到的值相比，我们观察到T_kin略有上升，而⟨β⟩略有下降。当仅对质子和轻（反）原子核进行拟合时，观察到相似的⟨β⟩和显著更高的T_kin。在大多数碰撞能量下，T_kin和⟨β⟩均显示出较弱的能量依赖性。

英文摘要：

We report the investigation of the kinetic freeze-out properties of identified hadrons ($π^\pm$, $K^\pm$ and $p(\bar p)$) along with light (anti-)nuclei $d (\bar d)$, $t (\bar t)$ and ${}^{3}He$ in relativistic heavy-ion collisions at RHIC and LHC energies. A simultaneous fit is performed with the Blast-Wave (BW) model to the transverse momentum ({\ppt}) spectra of identified hadrons together with light (anti-)nuclei produced in $Au+Au$ collisions at {\sqrtsNN} = 7.7 -- 200 GeV at the RHIC and in $Pb+Pb$ collisions at $\sqrt{\mathrm{s}_{_{\mathrm{NN}}}}$ = 2.76 TeV at the LHC. The energy and centrality dependence of freeze-out parameters, i.e., kinetic freeze-out temperature ($T_{kin}$) and collective flow velocity $\langle β\rangle$ has been studied. It is observed that light (anti-)nuclei also participate in the collective expansion of the medium created in the collision when included in a common fit with the light hadrons. We observe a marginal rise in $T_{kin}$ and a slight decrease in $\langle β\rangle$ when compared to the values obtained from the fit to light hadrons. A similar $\langle β\rangle$ and significantly larger $T_{kin}$ is observed when a fit is performed to only protons and light (anti-)nuclei. Both, $T_{kin}$ and $\langle β\rangle$ show a weak energy dependence at most collision energies.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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