Correlation of the hidden-charm molecular tetraquarks and the charmoniumlike structures existing in the $B\to XYZ+K$

Abstract

The molecular assignments to the three $P_c$ states and the similar production mechanism between the ${\Lambda }_b\to P_c+K$ and $B\to XYZ+K$ convince us the $B$ decaying to a charmonium state plus light mesons could be the appropriate production process to search for the charmoniumlike molecular tetraquarks. In this work, we systematically study the interactions between a charmed (charmed-strange) meson and an anti-charmed (anti-charm-strange) meson, which include the $D^{(\ast )}{\bar{D}}^{(\ast )}$, ${\bar{D}}^{(\ast )}{\bar{D}}_1$, $D^{(\ast )}{\bar{D}}_2^{\ast }$, $D_s^{(\ast )}{\bar{D}}_s^{(\ast )}$, $D_s^{(\ast )}{\bar{D}}_{s0}^{\ast }$, $D_s^{(\ast )}{\bar{D}}_{s1}^{\prime }$, $D_s^{(\ast )}{\bar{D}}_{s1}$, $D_s^{(\ast )}{\bar{D}}_{s2}^{\ast }$ systems. After adopting the one-boson-exchange effective potentials, our numerical results indicate that, on one hand, there can exist a serial of isoscalar charmoniumlike $\mathcal{D}\bar{\mathcal{D}}$ and ${\mathcal{D}}_s{\bar{\mathcal{D}}}_s$ molecular states, on the other hand, we can fully exclude the charged charmoniumlike states as the isovector charmoniumlike molecules. Meanwhile, we discuss the two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and ${\mathcal{D}}_s{\bar{\mathcal{D}}}_s$ molecules, especially the $D^{\ast }{\bar{D}}^{\ast }$ molecular tetraquarks. By analyzing the experimental data collected from the $B\to XYZ+K$ and the mass spectrum and two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and ${\mathcal{D}}_s{\bar{\mathcal{D}}}_s$ molecules, we find several possible hints of the existence of the charmoniumlike molecular tetraquarks, i.e., a peculiar characteristic mass spectrum of the isoscalar $D^{\ast }{\bar{D}}^{\ast }$ molecular systems can be applied to identify the charmoniumlike molecule. We look forward to the future experiments like the LHCb, Belle II, and BESIII Collaborations can test our results with more precise experimental data.

arXiv comment26 pages, 9 figures

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