论文标题
通过重型离子碰撞中的相关性探索$λ$ -Deuteron的互动
Exploring the $Λ$-deuteron interaction via correlations in heavy-ion collisions
论文作者
论文摘要
研究了$λ$ -Deuteron两粒子动量相关函数，以高能重型离子碰撞进行测量。特别是，解决此类相关性是否可以作为基础$λn$相互作用的其他信息来源。该研究是在Lednicky-Lyuboshits形式主义中进行的，它利用了两个相关的$ S $ - 波$λd$振幅的有效范围扩展，并从文献中获取了参数。发现在以大发源来源为特征的碰撞中，$λd$相关函数对四重奏状态（$^4S_ {3/2} $）主要敏感。相比之下，对于小源大小，双重偏波（$^2s_ {1/2} $）的贡献可能很重要。尽管后者受到高三体结合能的限制，但其当前的实验不确定性阻碍了对双线振幅的准确确定，并且反过来使对四重奏状态的结论变得复杂。
$Λ$-deuteron two-particle momentum correlation functions, to be measured in high-energy heavy-ion collisions, are investigated. In particular, the question is addressed whether such correlations can serve as an additional and alternative source of information on the elementary $ΛN$ interaction. The study is performed within the Lednicky-Lyuboshits formalism, utilizing an effective range expansion for the two relevant $S$-wave $Λd$ amplitudes with parameters taken from the literature. It is found that in collisions characterized by a large emitting source the $Λd$ correlation function is predominatly sensitive to the quartet state ($^4S_{3/2}$). In contrast, for small source sizes the contribution from the doublet partial wave ($^2S_{1/2}$) could be significant. Though the latter is constrained by the hypertriton binding energy, its present experimental uncertainty impedes an accurate determination of the doublet amplitude and, in turn, complicates conclusions on the quartet state.
