论文标题
$ t_ {cc}^+$的重夸克 - 旋转分子伴侣的耐药衰变
Hadronic decays of the heavy-quark-spin molecular partner of $T_{cc}^+$
论文作者
论文摘要
从假设在LHCB上发现的$ t_ {cc}^+$是$ d^{\ ast+} d^0/d^0/d^{\ ast 0} d^+$ hadronic Molecule，我们考虑其重型Quark Spin的部分宽度d^{\ ast 0} $浅的绑定状态，腐烂到$ d^{\ ast}dπ$最终状态，包括$ d^{\ ast} d $和$ d^{\ ast}π$最终状态交互的贡献。由于存在$ t_ {cc}^+$ pole，因此$ i = 0 $ $ $ $ d^{\ ast} d $ rectatering可以对仅考虑树图和$ d^{\ ast}π$ cuscrection recrection corcection $ 10的衰减宽度的大约40美元\％$ $ 40 \％。 $ t_ {cc}^{*+} $中的四体局部宽度也明确计算出来，我们发现不同中间$ d^*dπ$状态之间的干扰效应很小。 $ t_ {cc}^{*+} $的总宽度预计约为41 keV。
Starting from the hypothesis that the $T_{cc}^+$ discovered at LHCb is a $D^{\ast+} D^0/D^{\ast 0}D^+$ hadronic molecule, we consider the partial width of its heavy quark spin partner, the $T_{cc}^{\ast +}$ as a $D^{\ast +} D^{\ast 0}$ shallow bound state, decaying into the $D^{\ast}Dπ$ final states including the contributions of the $D^{\ast} D$ and $D^{\ast} π$ final state interaction by using a nonrelativistic effective field theory. Because of the existence of the $T_{cc}^+$ pole, the $I=0$ $D^{\ast} D$ rescattering can give a sizeable correction up to about $40\%$ to the decay widths considering only the tree diagrams, and the $D^{\ast} π$ rescattering correction is about $10\%$. The four-body partial widths of the $T_{cc}^{*+}$ into $D Dππ$ are also explicitly calculated, and we find that the interference effect between different intermediate $D^*Dπ$ states is small. The total width of the $T_{cc}^{*+}$ is predicted to be about 41 keV.
