论文标题
在$ \ sqrt {s_ {nn}} = 7.7 $ gev中，通过net-kaon累积量在au+au碰撞中探测奇怪的波动和相关性
Probing fluctuations and correlations of strangeness by net-kaon cumulants in Au+Au collisions at $\sqrt{s_{NN}} = 7.7$ GeV
论文作者
论文摘要
我们使用多相结合机制和所有电荷保守定律，使用多相传输模型（AMPT）计算$ \ sqrt {s_ {nn}} = 7.7 $ GEV的AU+AU碰撞中Net-Kaon多重分布的累积和相关函数。 AMPT模型可以定性地描述净 - KAON累积剂的中心性依赖性和通过Star实验测量的累积比率。通过关注累积剂，累积比率和相关功能的阶段演变，我们揭示了对相对论重型离子碰撞动态演变过程中陌生性的波动和相关性的几个关键影响，包括陌生的产生和扩散，放射线，放体，放体，放射式脱落以及弱衰变。不考虑动态模型中量子染色体动力学的关键波动，我们证明了净 - kaon波动在很大程度上代表了净危机波动。我们的结果提供了理解净kaon和网络差异波动的基线，这有助于寻找相对论重型离子碰撞中关键终点的可能的关键行为。
We calculate the cumulants and correlation functions of net-kaon multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}} = 7.7$ GeV using a multiphase transport model (AMPT) with both a new coalescence mechanism and all charge conservation laws. The AMPT model can qualitatively describe the centrality dependences of the net-kaon cumulants and cumulant ratios measured by the STAR experiment. By focusing on the stage evolution of the cumulants, cumulant ratios, and correlation functions, we reveal several key effects on the fluctuations and correlations of strangeness during the dynamical evolution of relativistic heavy-ion collisions, including strangeness production and diffusion, hadronization, hadronic rescatterings, and weak decays. Without considering the quantum chromodynamics critical fluctuations in the dynamic model, we demonstrate that the net-kaon fluctuations can largely represent the net-strangeness fluctuations. Our results provide a baseline for understanding the net-kaon and net-strangeness fluctuations, which help to search for the possible critical behaviors at the critical end point in relativistic heavy-ion collisions.
