What does this research mean for the field?

The three-body systems D* D* K* and B* B* K* can form bound states due to attractive interactions among their constituents, leading to exotic states with open quarks. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to theoretically explore the bound states in the three-body systems of D*D*K* and B*B*K* mesons.

March 1, 2026

Molecular states of D * D * K * and B * B * K * nature

Key Points

This research aims to theoretically explore the bound states in the three-body systems of D*D*K* and B*B*K* mesons.
Utilized the fixed center approximation to the Faddeev equations.
Investigated the interactions of D*D* and D*K* for the D* system.
Examined the B*B* and B*K* interactions for the B* system.
Identified bound states for the D*D*K* system as exotic states with open quarks.
Found similar bound states in the B*B*K* system with attractive interactions.
Characterized the states with isospin I = 1/2, negative parity, and total spins of J = 0, 1, and 2.

Abstract

We report the theoretical study of the three -body system composed of D * D * K * and B * B * K * . We study the interaction of two D * (or two B * ) and one K * by using the fxed center approximation to the Faddeev equations to search for bound states of the three -body system. Since the D * D * interaction is attractive and the D * K * interaction is also attractive, we can expect to obtain the bound state of the three -body system D * D * K * , which is manifestly exotic state with ccs open quarks. Using the same analogy of the D * D * K * system, we also study the B * B * K * system containing the bbs open quarks since both interactions of B * B * and B * K * are attractive. We obtain the bound states of isospin I = 1 / 2, negative parity, and total spin J = 0, 1 and 2.

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