Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

Abstract

We investigate a nonrelativistic model of tetraquarks, which are assumed to be compact and to consist of diquark-antidiquark pairs. We fit, for the first time, basically all currently known values for the measured masses of 45 mesons, including both charmed and bottom mesons, to the model and predict masses of tetraquarks as well as diquarks. In particular, we find masses of four axial-vector diquarks, i.e., $qc$, $cc$, $qb$, and $bb$, where $q=u,d$, and 24 ground-state tetraquarks, including both heavy-light tetraquarks ($qc\overline{qc}$ and $qb\overline{qb}$) and heavy tetraquarks ($cc\overline{cc}$ and $bb\overline{bb}$). In general, our results for the masses of $qb\overline{qb}$, $cc\overline{cc}$, and $bb\overline{bb}$ are largely comparable with other reported results, whereas our results for the masses of $qc\overline{qc}$ are slightly larger than what has been found earlier. Finally, we identify some of the obtained predictions for masses of tetraquarks with masses of experimental tetraquark candidates, and especially, we find that $\psi (4660)$, $Z_b(10610)$, and $Z_b(10650)$ could be described by the model.

arXiv comment12 pages, 1 figure. Final version published in Phys. Rev. D

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• Flavor Exotic Triply-Heavy Tetraquark States in AdS/QCD Potential
• Pseudoscalar charmonium pair interactions via the Pomeron exchange mechanism
• Mass-Spectroscopy of hidden charm and hidden strange tetraquarks in diquark-antidiquark approach
• Investigation of Mass and Decay Characteristics of the All-light Tetraquark
• Regge trajectories for the triply heavy bottom-charm baryons in the diquark picture
• Regge trajectories for the light diquarks
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• Prediction of charmed-bottom pentaquarks in quark model
• Tetraquark mass relations in quark and diquark models
• Heavy Hexaquarks in the Flux Tube Model
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• Investigation of Mass and Decay Characteristics of the Light-Strange Tetraquark
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