粲介子与轻味介子相互作用的研究
Studying the interaction between charm and light-flavor mesons
AI总结：
ALICE合作组首次测量高多重数质子-质子碰撞中粲介子与轻味介子的动量关联函数，发现数据可仅由库仑相互作用描述，表明二者间存在浅相互作用，并提取了与零相容的散射长度。
摘要：
ALICE合作组首次在高多重数质子-质子碰撞中，于质心能量$\sqrt{s}=13$ TeV下，测量了粲介子（$\mathrm{D^{*\pm}}$和$\mathrm{D}^\pm$）与带电轻味介子（$π^{\pm}$和K$^{\pm}$）在所有电荷组合下的两粒子动量关联函数。对于$\mathrm{DK}$和$\mathrm{D^*K}$对，实验结果与基于格点量子色动力学计算和手征有效场论的残余强相互作用理论预言一致。对于$\mathrm{D}π$和$\mathrm{D^*}π$对，观测到包含强相互作用的计算结果与测量之间存在张力。对于所有粒子对，数据可以仅用库仑相互作用充分描述，表明粲介子与轻味介子之间存在浅束缚相互作用。最后，通过用采用高斯势的模型拟合实验关联函数，确定了支配$\mathrm{D}π$和$\mathrm{D^*}π$系统残余强相互作用的散射长度。提取的值很小，且与零相容。
英文摘要：
The two-particle momentum correlation functions between charm mesons ($\mathrm{D^{*\pm}}$ and $\mathrm{D}^\pm$) and charged light-flavor mesons ($π^{\pm}$ and K$^{\pm}$) in all charge-combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton-proton collisions at a center-of-mass energy of $\sqrt{s} =13$ TeV. For $\mathrm{DK}$ and $\mathrm{D^*K}$ pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. In the case of $\mathrm{D}π$ and $\mathrm{D^*}π$ pairs, tension between the calculations including strong interactions and the measurement is observed. For all particle pairs, the data can be adequately described by Coulomb interaction only, indicating a shallow interaction between charm and light-flavor mesons. Finally, the scattering lengths governing the residual strong interaction of the $\mathrm{D}π$ and $\mathrm{D^*}π$ systems are determined by fitting the experimental correlation functions with a model that employs a Gaussian potential. The extracted values are small and compatible with zero.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
