Abstract
In a recent theoretical work, Phys. Lett. B785, 112 (2018), we proposed that a K* resonance with hidden charm content arises from the \( KD{\overline{D}}^{\ast } \) dynamics, where the \( D{\overline{D}}^{\ast } \) system is treated as a Zc(3900) or X(3872). With the motivation of determining its further properties, which can be observed in experiments, we now present a calculation of the decay processes of this K*, namely K*(4307), to two-body channels. Particularly, we consider the decay channels J/ψK*(892), \( \overline{D}{D}_s \), \( \overline{D}{D}_s^{*} \) and \( {\overline{D}}^{\ast }{D}_s^{*} \). The mechanisms of the decay to these channels involve triangular loops and are a consequence of the internal structure of the state. Thus, the values found for the decay widths of the proposed K*(4307) are related to its nature and should be valuable for carrying on an experimental study of the K*(4307). A K* state with such a mass (in the charmonium region) and quantum numbers is a clear manifestation of an exotic meson, since, having hidden charm (i.e., a \( c\overline{c} \) pair), its mass and quantum numbers can not be explained within a quark-antiquark description.
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Ren, XL., Malabarba, B.B., Khemchandani, K.P. et al. On the two-body decay processes of the predicted three-body K*(4307) resonance. J. High Energ. Phys. 2019, 103 (2019). https://doi.org/10.1007/JHEP05(2019)103
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DOI: https://doi.org/10.1007/JHEP05(2019)103