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arXiv · 2407.08816

Improved analysis of strong-interaction-stable doubly-bottom tetraquarks on the lattice

B. Colquhoun·A. Francis·R. J. Hudspith·R. Lewis·K. Maltman·W. G. Parrott
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Abstract

We update earlier lattice results for the binding energies of the flavor antitriplet of strong-interaction-stable doubly bottom, $J^P=1^+$ tetraquarks, employing an extended sink construction which produces significantly improved ground-state effective-mass plateaus, as well as new, larger-volume ensembles which reduce possible finite-volume effects at lighter pion masses. The updated bindings are $115(17)$ MeV for the $I=0$ member of the antitriplet and $47(8)$ MeV for its $I=1/2$ partner. We also provide an update of our earlier study of the variable heavy mass dependence of binding in the $1^+$ channel and new results on this dependence for binding in the $0^+$ channel, accessible when the two heavy quarks have unequal masses. Implications of these results of potential relevance to experimental searches for signals of the production of doubly bottom tetraquarks and/or a possible bottom-charm partner of the $T_{cc}$ are also discussed.

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B. Colquhoun, A. Francis, R. J. Hudspith, R. Lewis, K. Maltman, W. G. Parrott. 2024-07-11. Improved analysis of strong-interaction-stable doubly-bottom tetraquarks on the lattice. https://arxiv.org/abs/2407.08816

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