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Inspired by the recent discovery of the doubly charmed tetraquark state$T_{cc}^{+}$ by the LHCb Collaboration, we perform a systematic study of massesand strong decays of open charm hexaquark states${\Sigma}_{c}^{(\ast)}\Sigma_{c}^{(\ast)}$. Taking into account heavy quarkspin symmetry breaking, we predict several bound states of isospin $I=0$,$I=1$, and $I=2$ in the one boson exchange model. Moreover, we adopt theeffective Lagrangian approach to estimate the decay widths of${\Sigma}_{c}^{(\ast)}\Sigma_{c}^{(\ast)} \to \Lambda_{c}\Lambda_{c}$ and theirrelevant ratios via the triangle diagram mechanism, which range from a few MeVto a few tens of MeV. We strongly recommend future experimental searches forthe ${\Sigma}_{c}^{(\ast)}\Sigma_{c}^{(\ast)}$ hexaquark states in the$\Lambda_c\Lambda_c$ invariant mass distributions.

Masses and strong decays of open charm hexaquark states $\Sigma_{c}^{(\ast)}{\Sigma}_{c}^{(\ast)}$