发表机构
LIP（粒子物理与核物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究探究重离子碰撞中ν-关联子的介质修正，发现致密介质中ν→0时其1/ν增强行为受调控，小角度分布随ν值变化，ν<1时对大角度介质修正灵敏度更高。
AI 中文摘要
我们研究重离子碰撞中喷注上测量的广义投影能量关联子（称为ν-关联子）的介质修正。这类关联子的真空分布呈现出特征性的1/ν增强，我们证明在致密介质中，当ν→0时，该行为在BDMPS-Z和半经典近似下均受到调控。因此，与真空基准相比，介质诱导发射的贡献被参数化抑制。我们在JEWEL生成的模拟事件中观察到类似趋势。我们发现，尽管大角度增强在不同ν值下定性相似，但小角度分布在ν<1和ν>1之间发生剧烈变化，这表明主要由喷注能量损失驱动的小角度修正以不同方式印记在ν-关联子上。特别是，对于ν<1，小角度增强不那么显著，这提示这类关联子可能对大角度区域的介质修正提供更高的灵敏度。
英文摘要
We study medium modifications to generalized projected energy correlators, referred to as $ν$-correlators, measured on jets in heavy-ion collisions. While the vacuum distributions of these correlators exhibit a characteristic $1/ν$ enhancement, we show that in a dense medium this behavior is regulated within both the BDMPS-Z and semi-classical approximations as $ν\to 0$. As a result, contributions from medium-induced emissions become parametrically suppressed relative to the vacuum baseline. We observe a similar trend in the simulated events generated with JEWEL. We find that while the large angle enhancement is qualitatively similar across different values of $ν$, the small angle distribution changes drastically between $ν<1$ and $ν>1$. This indicates that small angle modifications, primarily driven by jet energy loss, are imprinted differently across $ν$-correlators. In particular, for $ν<1$ the small angle enhancement is less prominent which suggests that these correlators may provide improved sensitivity to medium modifications in the large angle region.
Comments13 pages, 8 figures
