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arXiv · 2006.08087

Masses of doubly heavy tetraquarks $T_{QQ^\prime}$ in a relativized quark model

Qi-Fang Lü·Dian-Yong Chen·Yu-Bing Dong
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Abstract

In the present work, the mass spectra of doubly heavy tetraquarks $T_{QQ^\prime}$ are systematically investigated in a relativized quark model. The four-body systems including the Coulomb potential, confining potential, spin-spin interactions, and relativistic corrections are solved within the variational method. Our results suggest that the $IJ^P=01^+$ $bb \bar u \bar d$ state is 54 MeV below the relevant $\bar B \bar B$ and $\bar B \bar B^*$ thresholds, which indicates that both strong and electromagnetic decays are forbidden, and thus this state can be a stable one. Its large hidden color component and small root mean square radius demonstrate that it is a compact tetraquark rather than a loosely bound molecule or point-like diquark-antidiquark structure. Our predictions of the doubly heavy tetraquarks may provide valuable information for future experimental searches.

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Qi-Fang Lü, Dian-Yong Chen, Yu-Bing Dong. 2020-06-15. Masses of doubly heavy tetraquarks $T_{QQ^\prime}$ in a relativized quark model. https://doi.org/10.1103/physrevd.102.034012

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