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Jia, W. H., Su, P. S., Liang, W. H., Molina, R., & Oset, E. (2026). Superexotic K* plus D* plus K* plus bound state. Phys. Lett. B, 875, 140320–8pp.
Abstract: We study a system made from K*+D*+K*+ with charge 3, isospin I = 3/2, spin J = 3, and a quark content of cdisusu, which make it highly exotic relative to the standard qqi structure of mesons. The interaction of the three body system is obtained starting from a cluster of D*+K*+ in I = 1 and J = 2, that in different works has been found bound, and adding to it an extra K*+ with spin aligned with those of the vectors of the cluster. We find that the K*K* interaction in I = 1 and J = 2 is repulsive, but its strength is small compared to that of D*+K*+ in I = 1 and J = 2, such that we find a three body state bound by about 100 MeV with respect to the mass of a K*+ and the D*+K*+ cluster. The width of the state, of about 10 MeV, is much smaller than the binding, which facilitates its observation. We suggest to find that state by measuring the invariant mass of KDK*, something feasible in present experimental facilities.
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Li, H. P., Yi, J. Y., Xiao, C. W., Yao, D. L., Liang, W. H., & Oset, E. (2024). Correlation function and the inverse problem in the BD interaction. Chin. Phys. C, 48(5), 053107–7pp.
Abstract: We study the correlation functions of the (BD+)-D-0, (B+D0) system, which develops a bound state of approximately 40MeV, using inputs consistent with the T-cc(3875) state. Then, we address the inverse problem starting from these correlation functions to determine the scattering observables related to the system, including the existence of the bound state and its molecular nature. The important output of the approach is the uncertainty with which these observables can be obtained, considering errors in the (BD+)-D-0, (B+D0) correlation functions typical of current values in correlation functions. We find that it is possible to obtain scattering lengths and effective ranges with relatively high precision and the existence of a bound state. Although the pole position is obtained with errors of the order of 50% of the binding energy, the molecular probability of the state is obtained with a very small error of the order of 6%. All these findings serve as motivation to perform such measurements in future runs of high energy hadron collisions.
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