Masses and strong decays of open charm hexaquark states $$\Sigma _{c}^{(*)}{\Sigma }_{c}^{(*)}$$ Σ c ( ∗ ) Σ c ( ∗ )

Inspired by the recent discovery of the doubly charmed tetraquark state $$T_{cc}^{+}$$ by the LHCb Collaboration, we perform a systematic study of masses and strong decays of open charm hexaquark states $${\Sigma }_{c}^{(*)}\Sigma _{c}^{(*)}$$ . Taking into account heavy quark spin 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 the effective Lagrangian approach to estimate the decay widths of $${\Sigma }_{c}^{(*)}\Sigma _{c}^{(*)} \rightarrow \Lambda _{c}\Lambda _{c}$$ and their relevant ratios via the triangle diagram mechanism, which range from a few MeV to a few tens of MeV. We strongly recommend future experimental searches for the $${\Sigma }_{c}^{(*)}\Sigma _{c}^{(*)}$$ hexaquark states in the $$\Lambda _c\Lambda _c$$ invariant mass distributions.