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Search for Bottomonium States in Exclusive Radiative<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Υ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>Decays
We search for bottomonium states in $\ensuremath{\Upsilon}(2S)\ensuremath{\rightarrow}(b\overline{b})\ensuremath{\gamma}$ decays with an integrated luminosity of $24.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded at the $\ensuremath{\Upsilon}(2S)$ resonance with the Belle detector at KEK, containing $(157.8\ifmmode\pm\else\textpm\fi{}3.6)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(2S)$ events. The $(b\overline{b})$ system is reconstructed in 26 exclusive hadronic final states composed of charged pions, kaons, protons, and ${K}_{S}^{0}$ …