获取高能核碰撞中的零点涨落
Accessing zero-point fluctuations in high-energy nuclear collisions
浏览论文内容
中文总结 AI 辅助
本文通过超中心高能核碰撞的逐事件涨落测量铅核半径的零点涨落，验证核结构预测，并指出经典Glauber模型高估涨落，强调泡利原理的抑制作用及其可检验的A依赖性。
中文摘要 AI 辅助
相同原子核之间的超中心高能碰撞对碰撞瞬间核子冻结构型的大小和形状非常敏感，这一信息编码在碰撞原子核的基态波函数中。碰撞后不久，碰撞系统大小的相对标准差最近已从LHC上$^{208}$Pb核碰撞中每个粒子动量的逐事件涨落推断出来，由于单个碰撞事件产生数千个粒子，这一信息非常精确。我们将这一测量与铅核半径的零点涨落幅度联系起来。从数据中提取的值与核结构计算的预测一致，但被高能碰撞的经典Glauber型模型高估。强调了泡利原理在抑制涨落中的作用。它导致了一个独特的$A$依赖性，可以在较小系统的碰撞中进行检验。
英文摘要
Ultracentral high-energy collisions between identical nuclei are very sensitive to the size and shape of the frozen configuration of nucleons at the instant of the collision, an information that is encoded in the ground state wave functions of the colliding nuclei. The relative standard deviation of the size of the colliding system soon after the collision has recently been inferred from event-by-event fluctuations of the momentum per particle in collisions of $^{208}$Pb nuclei at the LHC, and since a single collision event produces thousands of particles, this information is very precise. We connect this measurement to the magnitude of the zero-point fluctuations of the radius of the lead nucleus. The value that is extracted from the data is compatible with predictions from nuclear-structure calculations, but is overestimated by classical Glauber-type modeling of high-energy collisions. The role of the Pauli principle in suppressing the fluctuations is underlined. It leads to a distinctive $A$ dependence that could be checked in collisions of smaller systems.
发表机构
- Université Paris Saclay, CNRS, CEA, Institut de physique théorique（巴黎萨克雷大学、法国国家科学研究中心、法国原子能和替代能源委员会、理论物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
