LArQL：处理液态氩中光和电荷产生的唯象模型
LArQL: A phenomenological model for treating light and charge generation in liquid argon
摘要：
实验数据表明，LAr的电离电荷和闪烁光都依赖于沉积能量密度（$dE/dx$）和电场（$\mathcal{E}$）。此外，自由电离电荷和闪烁光在给定的（$dE/dx$，$\mathcal{E}$）对上是互补的，并且是相互关联的。我们提出了LArQL，一个唯象模型，提供了光和电荷之间的相互关系，其依赖于沉积的能量以及施加的电场。在零电场和低电场下，考虑逃逸电子的贡献，修正了Birks电荷模型，并与Birks模型在高电场下的预测相一致。对于在低$\mathcal{E}$下工作的LArTPC和重电离粒子，观察到与当前Birks模型的偏差。LArQL模型在$dE/dx$和LArTPC中相互作用粒子的场范围上给出了令人满意的描述，并与现有数据拟合良好。通过数据集编译和全局拟合进行的改进也是该模型的有趣功能。
英文摘要：
Experimental data shows that both ionization charge and scintillation light in LAr depend on the deposited energy density ($dE/dx$) and electric field ($\mathcal{E}$). Moreover, free ionization charge and scintillation light are anticorrelated, complementary at a given ($dE/dx$, $\mathcal{E}$) pair. We present LArQL, a phenomenological model that provides the anticorrelation between light and charge and its dependence on the deposited energy as well as on the electric field applied. It modifies the Birks' charge model considering the contribution from the escape electrons at null and low electric fields, and reconciles with Birks' model prediction at higher fields. Deviations from current Birks' model are observed for LArTPCs operating at low $\mathcal{E}$ and for heavily ionizing particles. The LArQL model presents a satisfactory description at $dE/dx$ and field ranges for interacting particles in LArTPCs and fits well the available data. Improvements via data sets compilation and global fits are also interesting features of the model.
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