Looking for the exotic X0(2866) and its JP=1+ partner in the (B)over-bar0 → D(*) + K- K(*)0 reactions

We propose two reactions, (B) over bar (0) -> (KD+K-)-D-0 and (B) over bar (0) -> K*D-0*K-+(-), which have been already measured at Belle, to look into the J(P) = 0(+), X-0(2866) state and a 1(+) partner of molecular D*(K) over bar* nature by looking at the D+K- and D*K-+(-) invariant mass distributions, respectively. Very clear peaks over the background are predicted and the branching ratios for the production of these states are evaluated to facilitate the task of determining the needed statistics for their observation. We conclude that with the upgrade of Belle II clear peaks should be seen in both reactions for the two resonances discussed.

Automated summary

This study proposes to investigate specific resonances by examining the invariant mass distributions of two reactions. Clear peaks over the background are predicted, which will provide important guidance for the observation in the upgraded Belle II experiment.