论文标题
在山脉处的光核生产 - 聚结与热模型
Production of light nuclei at colliders -- coalescence vs. thermal model
论文作者
论文摘要
相对论重型离子碰撞中光核的产生都被热模型很好地描述了，其中光核与火球中所有物种的黑核处于平衡状态，以及通过聚球衰变后最终状态相互作用而形成的聚核模型。我们介绍并批判性地讨论了这两个模型，然后我们考虑了两个伪造其中一个模型的建议。第一个建议是测量外来核素$^4 {\ rm li} $的收益率，并将其与$^4 {\ rm He} $相比。在热模型和合并模型中，核素的产量之比完全不同。第二个建议是测量一个脱氧剂相关函数，该功能传递信息，无论是在热模型中所假定的，还是在核子发出后才形成deuteron，是从火球和所有其他黑色子发出的信息，如在凝聚模型中。 $ p \！ - \！^3 {\ rm he} $相关函数在这两个建议的背景下都引起了人们的关注：需要获得$^4 {\ rm li} $的收益率，该函数衰减为$ p $ $ p $和$^3 {\ rm he} $，但相关功能也可以告诉US $^3 {\ rm He} $ rm He}。
The production of light nuclei in relativistic heavy-ion collisions is well described by both the thermal model, where light nuclei are in equilibrium with hadrons of all species present in a fireball, and by the coalescence model, where light nuclei are formed due to final-state interactions after the fireball decays. We present and critically discuss the two models and further on we consider two proposals to falsify one of the models. The first proposal is to measure a yield of exotic nuclide $^4{\rm Li}$ and compare it to that of $^4{\rm He}$. The ratio of yields of the nuclides is quite different in the thermal and coalescence models. The second proposal is to measure a hadron-deuteron correlation function which carries information whether a deuteron is emitted from a fireball together with all other hadrons, as assumed in the thermal model, or a deuteron is formed only after nucleons are emitted, as in the coalescence model. The $p\! -\!^3{\rm He}$ correlation function is of interest in context of both proposals: it is needed to obtain the yield of $^4{\rm Li}$ which decays into $p$ and $^3{\rm He}$, but the correlation function can also tell us about an origin of $^3{\rm He}$.
