Title: Measurement of the p$-Σ^+$ correlation function in pp collisions at $\sqrt{\textit{s}}=13$ TeV Show Chinese title

Title: pp碰撞中p$-Σ^+$关联函数的测量在$\sqrt{\textit{s}}=13$ TeV

Abstract: In this letter, the first measurement of the femtoscopic correlation of protons and $\Sigma^+$ hyperons is presented and used to study the p$-\Sigma^+$ interaction. The measurement is performed with the ALICE detector in high-multiplicity triggered pp collisions at $\sqrt{s} = 13$ TeV. The $\Sigma^+$ hyperons are reconstructed using a missing-mass approach in the decay channel to $\textrm{p} + \pi^0$ with $\pi^0\rightarrow\gamma\gamma$, while both $\Sigma^+$ and protons are identified using a machine learning approach. These techniques result in a high reconstruction efficiency and purity, which allows the measurement of the p$-\Sigma^+$ correlation function for the first time. Thanks to the high significance achieved in the p$-\Sigma^+$ correlation signal, it is possible to discriminate between the predictions of different models of the N$-\Sigma$ interaction and to accomplish a first determination of the p$-\Sigma^+$ scattering parameters. Show Chinese abstract

Abstract: 在本文中，首次测量了质子和$\Sigma^+$超子的费米尺度相关性，并用于研究 p$-\Sigma^+$相互作用。 该测量是在 ALICE 探测器上进行的，高多重性触发的 pp 碰撞能量为$\sqrt{s} = 13$TeV。 $\Sigma^+$超子通过在衰变道到$\textrm{p} + \pi^0$的缺失质量方法进行重建，其中包含$\pi^0\rightarrow\gamma\gamma$，而$\Sigma^+$和质子则使用机器学习方法进行识别。 这些技术实现了高重建效率和纯度，使得首次测量p$-\Sigma^+$关联函数成为可能。 由于在p$-\Sigma^+$关联信号中达到了高显著性，可以区分N$-\Sigma$相互作用的不同模型预测，并完成对p$-\Sigma^+$散射参数的首次确定。