论文标题
$λ$ - $ - $ - $ - $ - $ - $ - proton-proton碰撞的相互作用在LHC
First measurement of the $Λ$-$Ξ$ interaction in proton-proton collisions at the LHC
论文作者
论文摘要
这封信中提供了有关$λ$和$ξ^ - $奇怪的巴里恩斯之间强烈相互作用的第一个实验信息。 $λ-ξ^ - $和$ \overlineλ-\overlineλ-\overlineλ-\ overlineλ-+} $对在$ \ sqrt {s} $ = 13 tev lhc的高质量质子 - proton（pp）碰撞中产生的相关函数是根据该对的相对动量的函数测量的。 femtsoscophy方法用于计算相关函数，然后将其与使用介子交换模型，手性有效场理论和晶格QCD计算获得的理论期望进行比较。数据支持小型散射参数的预测，同时用大型散射参数，因此表明$λ-ξ^{ - } $相互作用。数据的有限统计显着性尚未允许人们约束耦合通道的效果，例如$σ-ξ$和n $-Ω$。
The first experimental information on the strong interaction between $Λ$ and $Ξ^-$ strange baryons is presented in this Letter. The correlation function of $Λ-Ξ^-$ and $\overlineΛ-\overlineΞ^{+}$ pairs produced in high-multiplicity proton-proton (pp) collisions at $\sqrt{s}$ = 13 TeV at the LHC is measured as a function of the relative momentum of the pair. The femtoscopy method is used to calculate the correlation function, which is then compared with theoretical expectations obtained using a meson exchange model, chiral effective field theory, and Lattice QCD calculations close to the physical point. Data support predictions of small scattering parameters while discarding versions with large ones, thus suggesting a weak $Λ-Ξ^{-}$ interaction. The limited statistical significance of the data does not yet allow one to constrain the effects of coupled channels like $Σ-Ξ$ and N$-Ω$.
