论文标题
（抗）重离子碰撞中的核合成和（抗）核作为碰撞的“ baryonmeter”
(Anti)nucleosynthesis in heavy-ion collisions and (anti)nuclei as "baryonmeter" of the collision
论文作者
论文摘要
重型离子碰撞中光（抗）核的生产机制已在实验和理论上进行了广泛的研究。通常使用两个竞争（抗）核合成模型来描述重型离子碰撞中的光（抗）核的产量及其与其他黑核的比率：统计强化模型（SHM）和核子合并模型。区分这些现象学模型的可能性需要新的实验可观察到。鉴于其较大的重子数，光（抗）核对碰撞中产生的系统的巴属化学势（$μ_{\ rm b} $）具有很高的敏感性。在本次演讲中，提出了重型离子碰撞中逐个事件的抗抑郁量波动的首次测量，并将其与SHM和合并模型的期望进行了比较。此外，使用抗核核的比率用于获得$μ_ {\ rm b} $的测量，并具有前所未有的精度。
The production mechanism of light (anti)nuclei in heavy-ion collisions has been extensively studied experimentally and theoretically. Two competing (anti)nucleosynthesis models are typically used to describe light (anti)nuclei yields and their ratios to other hadrons in heavy-ion collisions: the statistical hadronization model (SHM) and the nucleon coalescence model. The possibility to distinguish these phenomenological models calls for new experimental observables. Given their large baryon number, light (anti)nuclei have a high sensitivity to the baryon chemical potential ($μ_{\rm B}$) of the system created in the collision. In this talk, the first measurement of event-by-event antideuteron number fluctuations in heavy-ion collisions is presented and compared with expectations of the SHM and coalescence model. In addition, the antinuclei-to-nuclei ratios are used to obtain a measurement of $μ_{\rm B}$ in heavy-ion collisions with unprecedented precision.
