Prediction of triple-charm molecular pentaquarks

In a one-boson-exchange model, we study molecular states of double-charm baryon (${\mathrm{\Xi }}_{cc}(3621)$) and a charmed meson ($D$ and $D^{\ast }$). Our model indicates that there exist two possible triple-charm molecular pentaquarks, a ${\mathrm{\Xi }}_{cc}D$ state with $I(J^P)=0(1\mathrm{/}{2}^{-})$ and a ${\mathrm{\Xi }}_{cc}{D}^{\ast }$ state with $I(J^P)=0(3\mathrm{/}{2}^{-})$. In addition, we also extend our formula to explore ${\mathrm{\Xi }}_{cc}{\bar{B}}^{(\ast )}$, ${\mathrm{\Xi }}_{cc}{\bar{D}}^{(\ast )}$, and ${\mathrm{\Xi }}_{cc}{B}^{(\ast )}$ systems, and find more possible heavy flavor molecular pentaquarks, a ${\mathrm{\Xi }}_{cc}\bar{B}$ state with $I(J^P)=0(1\mathrm{/}{2}^{-})$, a ${\mathrm{\Xi }}_{cc}{\bar{B}}^{\ast }$ state with $I(J^P)=0(3\mathrm{/}{2}^{-})$, and ${\mathrm{\Xi }}_{cc}{\bar{D}}^{\ast }\mathrm{/}{\mathrm{\Xi }}_{cc}{B}^{\ast }$ states with $I(J^P)=0(1\mathrm{/}{2}^{-})$. Experimental search for these predicted triple-charm molecular pentaquarks is encouraged.