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An assessment of $\mathbf{\Upsilon}$-states above $\mathbf{B\bar B}$-threshold using a constituent-quark-model based meson-meson coupled-channels framework by Ortega, P. G.; Entem, D. R.; Fernández, F.; Segovia, J. is a scholarly article available to read on EtoBox.

What is An assessment of $\mathbf{\Upsilon}$-states above $\mathbf{B\bar B}$-threshold using a constituent-quark-model based meson-meson coupled-channels framework about?

The $\Upsilon(10753)$ state has been recently observed by the Belle and Belle~II collaborations with enough global significance to motivate an assessment of the high-energy spectrum usually predicted by any reasonable \emph{na\"ive} quark model. In the framework of a constituent quark model which satisfactorily describes a wide range of properties of conventional hadrons containing heavy quarks, the quark-antiquark and meson-meson degrees of freedom have been incorporated with the goal of elucidating the influence of open-bottom meson-meson thresholds into the $\Upsilon$ states whose masses are within the energy range of the $\Upsilon(10753)$'s mass. It is well known that such effects could be relevant enough as to generate dynamically new states and thus provide a plausible explanation of the nature of the $\Upsilon(10753)$ state. In particular, we have performed a coupled-channels calculation in which the bare states $\Upsilon(4S)$, $\Upsilon(3D)$, $\Upsilon(5S)$ and $\Upsilon(4D)$ are considered together with the threshold channels $B\bar{B}$, $B\bar{B}^\ast$, $B^\ast \bar{B}^\ast$, $B_s\bar{B}_s$, $B_s\bar{B}_s^\ast$ and $B_s^\ast \bar{B}_s^\ast$. Among the results we have desc

Author

Ortega, P. G.; Entem, D. R.; Fernández, F.; Segovia, J.

Published

2024

Language

EN