Diabatic description of bottomoniumlike mesons

TL;DR

This paper uses a diabatic approach to analyze bottomonium-like mesons, successfully reproducing known resonances and predicting new states with specific quark-meson components, advancing understanding of their structure.

Contribution

It introduces a diabatic method for studying bottomonium states, including unconventional mesons, and predicts new resonances with specific decay channels.

Findings

Reproduces masses and widths of known bottomonium resonances.

Predicts a significant $B\bar{B}^{*}$ component in $\Upsilon(10580)$.

Forecasts a new narrow $1^{++}$ state with $B_{s}\bar{B}_{s}^{*}$ content.

Abstract

We apply the diabatic approach, specially suited for a QCD based study of conventional (quark-antiquark) and unconventional (quark-antiquark + meson-meson) meson states, to the description of hidden-bottom mesons. A spectral analysis of the $I=0$, $J^{++}$ and $1^{--}$ resonances with masses up to about $10.8$ GeV is carried out. Masses and widths of all the experimentally known resonances, including conventional and unconventional states, can be well reproduced. In particular, we predict a significant $B\bar{B}^{\ast}$ component in $\Upsilon(10580)$. We also predict the existence of a not yet discovered unconventional $1^{++}$ narrow state, with a significant $B_{s}\bar{B}_{s}^{\ast}$ content making it to decay into $\Upsilon(1S)\phi$, whose experimental discovery would provide definite support to our theoretical analysis.