ALP在部分子和强子级联模型PACIAE中的光产生
ALP photo-production in the parton and hadron cascade model PACIAE
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- Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University（华中师范大学夸克与轻子物理教育部重点实验室及粒子物理研究所）
- School of Mathematics and Statistics, Wuhan Textile University（武汉纺织大学数学与统计学院）
- School of Physics and Electronic Science, Guizhou Normal University（贵州师范大学物理与电子科学学院）
- School of Physics and Information Technology, Shaanxi Normal University（陕西师范大学物理学与信息工程学院）
- College of Physics, Sichuan University（四川大学物理学院）
- China Institute of Atomic Energy（中国原子能科学研究院）
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中文总结 AI 辅助
利用PACIAE模型模拟Au+Au碰撞，基于DCPC凝聚模型首次将光子对重组为ALP，计算了产额、横动量分布和快度谱，为实验提供理论预测。
中文摘要 AI 辅助
本研究采用部分子和强子级联模型PACIAE模拟了质心能量$\sqrt{s_{NN}}=200$ GeV的Au+Au碰撞事件，中心度区间为60-80%。基于最终强子态中丰富的光子，首次应用基于统计力学的凝聚模型DCPC，将冻结后光子对现象学地重组为类轴子粒子（ALPs）。凝聚概率由分支比$B_r(a \rightarrow γγ)=0.57$约束，该分支比在$K$介子质量两倍的阈值下确定。针对几个基准ALP质量区间，计算了ALP可观测量，包括产额、横动量分布和快度谱。这些理论预测值得实验研究。
英文摘要
In this work, the parton and hadron cascade model PACIAE is employed to simulate the events of Au+Au collisions at $\sqrt{s_{NN}}=$200 GeV within the 60-80 \% centrality interval. Based on the abundant photons in final hadronic state, the statistical-mechanics-based coalescence model DCPC is applied to phenomenologically recombine post-freeze-out photon pairs into axion-like particles (ALPs) for the first time. The coalescence probability is constrained by the branching-ratio $B_r(a \rightarrow γγ)=0.57$ under the threshold of twice of $K$ meson mass. The ALP observables including yields, transverse-momentum distributions and rapidity spectra are calculated for several benchmark ALP-mass bins. These theoretical predictions are worthy to be investigated by the experiments.
