Implications of a DK molecule at 2.32 GeV

We discuss the implications of a possible quasinuclear DK bound state at 2.32 GeV. Evidence for such a state was recently reported in D(s)(+)pi(0) by the BaBar Collaboration. We first note that a conventional quark model c (s) over bar assignment is implausible, and then consider other options involving multiquark systems. An I=0 c (s) over barn (n) over bar baryonium assignment is one possibility. We instead favor a DK meson molecule assignment, which can account for the mass and quantum numbers of this state. The higher-mass scalar c (s) over bar state expected at 2.48 GeV is predicted to have a very large DK coupling, which would encourage formation of an I=0 DK molecule. Isospin mixing is expected in hadron molecules, and a dominantly I=0 DK state with some I=1 admixture could explain both the narrow total width of the 2.32 GeV state as well as the observed decay to D(s)(+)pi(0). Additional measurements that can be used to test this and related scenarios are discussed.