论文标题
首次研究涉及魅力的两体散射
First study of the two-body scattering involving charm hadrons
论文作者
论文摘要
本文介绍了魅力哈登和核子之间相互作用的首次测量。 $ \ mathrm {pd^ - } $和$ \ mathrm {\ overline {p} d}^+$ pairs的两粒子动量相关性是通过爱丽丝合作在高级pp collisions中的$ \ sqrt {s} = 13〜 \ mathrm {tev} $ s的衡量的。数据与（1.1-1.5）$σ$内的仅库仑相互作用假设兼容。如果有吸引力的核子（n）$ \ edline {\ mathrm {d}} $强烈相互作用，那么一致性的水平会稍微提高，与大多数模型预测相反，这表明整体排斥相互作用。该测量值首次允许Isospin $ \ Mathrm {i} = 0 $的68％置信度间隔估计$ \ MATHRM {N \ overline {d}} $ State $ {f _ [-0.4,0.9]〜\ Mathrm {fm^{ - 1}}} $，假设Isospin $ \ Mathrm {i} = 1 $ Channel的ISOSPIN $ \ MATHRM {I}的交互作用可忽略不计。
This article presents the first measurement of the interaction between charm hadrons and nucleons. The two-particle momentum correlations of $\mathrm{pD^-}$ and $\mathrm{\overline{p}D}^+$ pairs are measured by the ALICE Collaboration in high-multiplicity pp collisions at $\sqrt{s} = 13~\mathrm{TeV}$. The data are compatible with the Coulomb-only interaction hypothesis within (1.1-1.5)$σ$. The level of agreement slightly improves if an attractive nucleon(N)$\overline{\mathrm{D}}$ strong interaction is considered, in contrast to most model predictions which suggest an overall repulsive interaction. This measurement allows for the first time an estimation of the 68% confidence level interval for the isospin $\mathrm{I}=0$ inverse scattering length of the $\mathrm{N\overline{D}}$ state ${f_{0,~\mathrm{I}=0}^{-1} \in [-0.4,0.9]~\mathrm{fm^{-1}}}$, assuming negligible interaction for the isospin $\mathrm{I}=1$ channel.
