Possible molecular dibaryons with csssqq quarks and their baryon–antibaryon partners

Abstract

Abstract In this work, we systematically investigate the charmed–strange dibaryon systems with csssqq quarks and their baryon–antibaryon partners from the interactions $$\varXi ^{(',*)}_{c}\varXi ^{(*)}$$ Ξ c ( ′ , ∗ ) Ξ ( ∗ ) , $$\varOmega ^{(*)}_c\varLambda $$ Ω c ( ∗ ) Λ , $$\varOmega ^{(*)}_c\varSigma ^{(*)}$$ Ω c ( ∗ ) Σ ( ∗ ) , $$\varLambda _c\varOmega $$ Λ c Ω and $$\varSigma ^{(*)}_c\varOmega $$ Σ c ( ∗ ) Ω and their baryon–antibaryon partners from interactions $$\varXi ^{(',*)}_{c}\bar{\varXi }^{(*)}$$ Ξ c ( ′ , ∗ ) Ξ ¯ ( ∗ ) , $$\varOmega ^{(*)}_c\bar{\varLambda }$$ Ω c ( ∗ ) Λ ¯ , $$\varOmega ^{(*)}_c\bar{\varSigma }^{(*)}$$ Ω c ( ∗ ) Σ ¯ ( ∗ ) , $$\varLambda _c\bar{\varOmega }$$ Λ c Ω ¯ and $$\varSigma ^{(*)}_c\bar{\varOmega }$$ Σ c ( ∗ ) Ω ¯ . The potential kernels are constructed with the help of effective Lagrangians under SU(3), heavy quark, and chiral symmetries to describe these interactions. To search for possible molecular states, the kernels are inserted into the quasipotential Bethe–Salpeter equation, which is solved to find poles from scattering amplitude. The results suggest that 36 and 24 bound states can be found in the baryon–baryon and baryon–antibaryon interactions, respectively. However, much large values of parameter $$\alpha $$ α are required to produce the bound states from the baryon–antibaryon interactions, which questions the existence of these bound states. Possible coupled-channel effect are considered in the current work to estimate the couplings of the molecular states to the channels considered.