论文标题
旨在理解P $ - $ P $ - $ P和P $ - $ P $-λ$的真正三体互动
Towards the understanding of the genuine three-body interaction for p$-$p$-$p and p$-$p$-Λ$
论文作者
论文摘要
三体核力量在细胞核和高核的结构中起重要作用，并且还纳入了模型中，以描述诸如中子恒星中的致密性重质物质的动力学。到目前为止，只有锚定在核的结合能的间接测量值才能用于约束三核力力，如果考虑了超子，那么对超核的稀缺数据仅对三体力施加弱约束。在这项工作中，我们介绍了P $ - $ P $ - $ P和P $ -P $ -P $-λ$ Systems的第一个直接测量。通过应用Kubo形式主义从相关函数中提取三粒子累积物，在减去已知的两体相互作用项后，可以分离出对这些相关性的三粒子相互作用的贡献。对于P $ - $ P $ - $ P系统的负累积剂，暗示存在残留三体效应，而对于P $ -P $ -P $-λ$，累积剂与零一致。该测量表明，LHC在LHC处的三 - 巴里族相关性的可及性。
Three-body nuclear forces play an important role in the structure of nuclei and hypernuclei and are also incorporated in models to describe the dynamics of dense baryonic matter, such as in neutron stars. So far, only indirect measurements anchored to the binding energies of nuclei can be used to constrain the three-nucleon force, and if hyperons are considered, the scarce data on hypernuclei impose only weak constraints on the three-body forces. In this work, we present the first direct measurement of the p$-$p$-$p and p$-$p$-Λ$ systems in terms of three-particle correlation functions carried out for pp collisions at $\sqrt{s} = 13$ TeV. Three-particle cumulants are extracted from the correlation functions by applying the Kubo formalism, where the three-particle interaction contribution to these correlations can be isolated after subtracting the known two-body interaction terms. A negative cumulant is found for the p$-$p$-$p system, hinting to the presence of a residual three-body effect while for p$-$p$-Λ$ the cumulant is consistent with zero. This measurement demonstrates the accessibility of three-baryon correlations at the LHC.
