在EIC通过强子化过程追踪胶子饱和现象
Tracing Gluon Saturation through Hadronization at EIC
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中文总结 AI 辅助
本研究在eHIJING中实现小x非线性演化的初态辐射算法，模拟发现EIC上整体强子反冲可作为追踪胶子饱和的可观测量，其贝叶斯 unfolding 能获取硬散射横动量分布。
中文摘要 AI 辅助
胶子饱和为研究核物质中强相互作用的非线性性质提供了一个窗口，饱和的直接后果之一是末态的横动量（$\boldsymbol{k}_T$）展宽。本文在完整的事例产生器框架内，研究强子化过程如何改变电子离子对撞机（EIC）上胶子饱和的常规特征。为此，我们在eHIJING中实现了基于小x非线性演化的初态辐射算法，并结合束流剩余物、末态辐射和强子化过程完成了整个事例的模拟。在模拟中，部分子层级的核横动量展宽信号在经过强子化后，在核子能量关联器和领头双强子方位角去关联中被大幅稀释；相比之下，整体强子反冲仍对 underlying 的横动量展宽保持敏感。我们进一步证明，对整体强子反冲进行贝叶斯 unfolding 可获取 underlying 的硬散射横动量分布。这些结果确立了整体强子反冲作为EIC上有前景的饱和可观测量的地位。
英文摘要
Gluon saturation provides a window into the nonlinear nature of the strong interaction in nuclear matter. One direct consequence of saturation is the $\boldsymbol{k}_T$ broadening in the final state.We investigate how hadronization reshapes conventional signatures of gluon saturation at EIC within a complete event-generator framework. To this end, we implement in eHIJING an initial-state-radiation algorithm based on nonlinear small-$x$ evolution and complete the events with beam remnants, final-state radiation, and hadronization. In our simulations, the signal of parton-level nuclear $\boldsymbol{k}_T$ broadening is strongly diluted in both the nucleon energy correlator and leading-dihadron azimuthal decorrelation after hadronization. Global hadronic recoil, by contrast, remains sensitive to the underlying $\boldsymbol{k}_T$ broadening. We further demonstrate that Bayesian unfolding of the global hadronic recoil provides access to the underlying hard-scattering $\boldsymbol{k}_T$ distribution. These results establish the global hadronic recoil as a promising saturation observable at the EIC.
发表机构
- Central China Normal University（华中师范大学）
- Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所）
- Shandong University（山东大学）
- École Polytechnique, Institut Polytechnique de Paris（巴黎理工学院巴黎综合理工学校）
机构由 AI 辅助整理，请以论文原文为准。
