发表机构
University of Houston（休斯顿大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次测量RHIC Au+Au碰撞中两粒子横向动量关联，发现其随参与者数呈幂律标度，并在中心碰撞中观察到能量依赖的非单调性。
AI 中文摘要
我们报告了STAR实验在$\sqrt{s_{\rm NN}} =$ 3.0、3.2、3.5、3.9、4.5、5.2和7.7 GeV下记录的Au+Au碰撞中，对中快度带电粒子进行的两粒子横向动量关联的首次测量。结果与之前STAR在束流能量扫描第一阶段（BES-I）的测量结果以及输运模型计算结果进行了比较。所测量的两粒子$p_{\rm T}$关联子表现出与参与者核子数（$N_{\rm part}$）近似幂律标度的关系，这与独立源情景的预期一致。在最低碰撞能量$\sqrt{s_{\rm NN}} = 3.0$~GeV下，这种标度关系描述得最差。此外，在中心碰撞中观察到$p_{\rm T}$关联的能量依赖呈现非单调性，这是首次系统性地观察到这种随碰撞能量变化的行为。
英文摘要
We report the first measurements of two-particle transverse momentum correlations for mid-rapidity charged particles in Au+Au collisions at $\sqrt{s_{\rm NN}} =$ 3.0, 3.2, 3.5, 3.9, 4.5, 5.2 and 7.7 GeV recorded by the STAR experiment. The results are compared with previous STAR measurements from the Beam Energy Scan Phase I (BES-I) and with transport model calculations. The measured two-particle $p_{\rm T}$ correlators exhibit an approximate power-law scaling with the number of participating nucleons ($N_{\rm part}$), consistent with expectations from an independent-source scenario. This scaling is least well described at the lowest collision energy, $\sqrt{s_{\rm NN}} = 3.0$~GeV. Furthermore, a non-monotonic energy dependence of the $p_{\rm T}$ correlations is observed in central collisions, representing the first systematic observation of such behavior as a function of collision energy.
CommentsStrangeness in Quark Matter 2026 proceedings, 4 pages, 2 Figures
Journal refJournal of Subatomic Particles and Cosmology 6, 100502 (2026)
DOI：10.1016/j.jspc.2026.100502
