Bottomonium-like states: physics case for energy scan above the $B\bar{B}$ threshold at Belle-II

Abstract

The Belle-II experiment is expected to collect large data samples at the ${\rm Y}(4S)$ and ${\rm Y}(5S)$ resonances to study primarily $B$ and $B_s$ mesons. We discuss what other data above the $B\bar{B}$ threshold are of interest. We propose to perform a high-statistics energy scan from the $B\bar{B}$ threshold up to the highest possible energy, and to collect data at the ${\rm Y}(6S)$ and at higher mass states if they are found in the scan. We emphasize the interest in increasing the maximal energy from 11.24\,GeV to 11.5 - 12\,GeV in the future. These data are needed for investigation of bottomonium and bottomonium-like states.

11 pages, 2 figures

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• Charmonium
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Hadro-Charmonium
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• Scalar Resonance Contributions to the Dipion Transition Rates of ${\rm Y}(4S,5S)$ in the re-scattering model
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• Strong decays and dipion transitions of Upsilon(5S)
• Enhanced breaking of heavy quark spin symmetry
• Measurement of the branching fraction for the decay Upsilon(4S) -> Upsilon(1S)pi+pi-
• Contribution of $Z_b$ resonances to ${\rm Y}(5S)\to \pi \pi \pi {\chi }_b$

Cited by in corpus (9)

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• Spin partners $W_{bJ}$ from the line shapes of the $Z_b(10610)$ and $Z_b(10650)$
• Bottomonium spectrum in the relativistic flux tube model
• Measurement of the energy dependence of the $e^{+}{e}^{-}\to B\bar{B}$, $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ exclusive cross sections
• Status and Prospects of Exotic Hadrons at Belle II
• Measurement of the $e^{+}{e}^{-}\to B_s^0{\bar{B}}_s^{0}X$ cross section in the energy range from $10.63$ to $11.02$ GeV using inclusive $D_s^{\pm }$ and $D^0$ production
• Some properties of the states at the hidden-strangeness mixed ${\frac{1}{2}}^{+}+{\frac{1}{2}}^{-}$ heavy meson pair threshold in $e^{+}{e}^{-}$ annihilation
• Exotic hadrons associated with $b$-quark
• Mass-Spectroscopy of [$bb][\bar{b}\bar{b}$] and [$bq][\bar{b}\bar{q}$] tetraquark states in a diquark-antidiquark formalism