用粗粒输运模拟探索相对论核碰撞中的化学冻结判据
Probing chemical freeze-out criteria in relativistic nuclear collisions with coarse grained transport simulations
摘要：
本文介绍了一种基于弹性和非弹性散射率的新方法，从强子输运模型中提取能量范围从E $_\mathrm{lab}=1.23$ AGeV到$\sqrt{s_\mathrm{NN}}=62.4$ GeV的化学冻结超曲面.在这项研究中，超相对论量子分子动力学（UrQMD）模型结合粗粒化方法。的化学冻结分布重建从π介子通过几个衰变和再形成链涉及共振，并考虑到非弹性，伪弹性和弦激发反应。提取的平均温度和重子化学势，然后比较统计模型分析。最后，我们研究了文献中提出的各种冻结标准。我们确认在这个微观动力学模拟，在所有能量的化学冻结与$\langle E\rangle/\langle N\rangle\approx1$ GeV相一致，而其他标准，如$s/T^3=7$和$n_\mathrm{B}+n_\mathrm{\bar{B}}\approx0.12$ FM $^{-3}$仅限于更高的碰撞能量。
英文摘要：
We introduce a novel approach based on elastic and inelastic scattering rates to extract the hyper-surface of the chemical freeze-out from a hadronic transport model in the energy range from E$_\mathrm{lab}=1.23$ AGeV to $\sqrt{s_\mathrm{NN}}=62.4$ GeV. For this study, the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model combined with a coarse-graining method is employed. The chemical freeze-out distribution is reconstructed from the pions through several decay and re-formation chains involving resonances and taking into account inelastic, pseudo-elastic and string excitation reactions. The extracted average temperature and baryon chemical potential are then compared to statistical model analysis. Finally we investigate various freeze-out criteria suggested in the literature. We confirm within this microscopic dynamical simulation, that the chemical freeze-out at all energies coincides with $\langle E\rangle/\langle N\rangle\approx1$ GeV, while other criteria, like $s/T^3=7$ and $n_\mathrm{B}+n_\mathrm{\bar{B}}\approx0.12$ fm$^{-3}$ are limited to higher 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。
