重离子碰撞中轻核与超核的产生
Production of Light Nuclei and Hypernuclei in Heavy-Ion Collisions
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中文总结 AI 辅助
本文回顾STAR和ALICE在SQM 2026上关于轻核与超核的测量，发现统计强子化模型无法统一描述所有比率，而聚变模型在考虑核结构和晚期动力学后能较好解释产额、关联与流，并揭示产生时序的影响。
中文摘要 AI 辅助
我们回顾了STAR和ALICE在SQM 2026会议上展示的关于轻核与超核产额、费米子关联以及集体流的最新测量结果。统计强子化计算为积分产额提供了有用的基准，但无法同时描述所有跨碰撞能量和系统尺寸的轻核比率。对于质量数$A<4$的束缚态，当前的聚变（coalescence）计算为产额、费米子关联和集体流提供了一致性较好的描述，尽管定量上的超氚核比较依赖于所假设的少体波函数。共振态$^{4}$Li相对于致密$^{4}$He的产额被抑制，表明核结构和晚期动力学的影响。然而，定量模型比较也依赖于对来自不稳定态的馈入（feed-down）的处理。在高多重数$p$+$p$碰撞中，π-氘核费米子关联进一步表明，大多数观测到的（反）氘核是在短寿命共振强衰变后通过核子聚变形成的。综合来看，这些测量表明，产生时序和内部核结构在物理可观测量上留下了可测量的印记。
英文摘要
We review recent STAR and ALICE measurements of light-nucleus and hypernucleus yields, femtoscopic correlations, and collective flow presented at SQM 2026. Statistical-hadronization calculations provide a useful baseline for integrated yields but do not simultaneously describe all measured light-nucleus ratios across collision energies and system sizes. For bound states with mass number $A<4$, current coalescence calculations provide a broadly consistent description of yields, femtoscopic correlations, and collective flow, although the quantitative hypertriton comparison depends on the assumed few-body wave function. The suppressed production of resonant $^{4}$Li relative to compact $^{4}$He indicates an effect of nuclear structure and late-stage dynamics. However, the quantitative model comparison also depends on the treatment of feed-down from unstable states. In high-multiplicity $p$+$p$ collisions, pion-deuteron femtoscopy further indicates that most observed (anti)deuterons are formed through nucleon fusion after strong decays of short-lived resonances. Taken together, these measurements show that production chronology and internal nuclear structure leave measurable imprints on the physics observables.
发表机构
- University of Chinese Academy of Sciences（中国科学院大学）
- University of Heidelberg（海德堡大学）
机构由 AI 辅助整理，请以论文原文为准。
