论文标题
$ t_ {cc}^{+}（3875）$相关$ dd^*$从$ n_f = 2 $ lattice qcd
$T_{cc}^{+}(3875)$ relevant $DD^*$ scattering from $N_f=2$ lattice QCD
论文作者
论文摘要
$ s $ -wave $ dd^*$ scatting in Isospin $ i = 0,1 $ channels以$ n_f = 2 $ lattice qcd at $m_π\ 350 $ meV研究。据观察，当$ dd^*$ channel中的$ dd^*$交互在$ dd^*$ Energy接近$ dd^*$阈值时。相比之下，$ i = 0 $ channel中的$ dd^*$交互在$ dd^*$ Energy的广泛范围内绝对具有吸引力。这与Isospin分配$ i = 0 $ for $ t_ {cc}^+（3875）$一致。通过分析$ dd^*$相关函数的组件，事实证明，负责$ i = 0,1 $ $ $ dd^*$交互的不同属性的夸克图可以理解为已收费的$ρ$ Meson Exchange效果。该观察结果提供了有关$ t_ {cc}^+（3875）$的内部动力学的直接信息。
The $S$-wave $DD^*$ scattering in the isospin $I=0,1$ channels is studied in $N_f=2$ lattice QCD at $m_π\approx 350$ MeV. It is observed that the $DD^*$ interaction is repulsive in the $I=1$ channel when the $DD^*$ energy is near the $DD^*$ threshold. In contrast, the $DD^*$ interaction in the $I=0$ channel is definitely attractive in a wide range of the $DD^*$ energy. This is consistent with the isospin assignment $I=0$ for $T_{cc}^+(3875)$. By analyzing the components of the $DD^*$ correlation functions, it turns out that the quark diagram responsible for the different properties of $I=0,1$ $DD^*$ interactions can be understood as the charged $ρ$ meson exchange effect. This observation provides direct information on the internal dynamics of $T_{cc}^+(3875)$.
