Exotic triple-charm deuteron-like hexaquarks

Adopting the one-boson-exchange model, we perform a systematic investigation of interactions between a doubly charmed baryon $({\mathrm{\Xi }}_{cc})$ and an $S$-wave charmed baryon (${\mathrm{\Lambda }}_c$, ${\mathrm{\Sigma }}_c^{(\ast )}$, and ${\mathrm{\Xi }}_c^{(\mathrm{\prime },\ast )}$). Both the $S$-$D$ mixing effect and coupled-channel effect are considered in this work. Our results suggest that there may exist several possible triple-charm deuteron-like hexaquarks. Meanwhile, we further study the interactions between a doubly charmed baryon and an $S$-wave anticharmed baryon. We find that a doubly charmed baryon and an $S$-wave anticharmed baryon can be easily bound together to form shallow molecular hexaquarks. These heavy flavor hexaquarks predicted here can be accessible at future experiment like LHCb.