Diabatic description of bottomoniumlike mesons

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 ${\rm Y}(10580)$. 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 ${\rm Y}(1S)\varphi$, whose experimental discovery would provide definite support to our theoretical analysis.

12 pages, 5 figures, 8 tables; v2: corrected values in Table VII

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• Quarkonia and their transitions
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