Search for $h_b(2P)\to \gamma {\chi }_{bJ}(1P)$ at $\sqrt{s}=10.860$ GeV

Belle Collaboration, A. Boschetti, R. Mussa +140

In the bottomonium sector, the hindered magnetic dipole (M1) transitions between P-wave states $h_b(2P)\to {\chi }_{bJ}(1P)\gamma$, $J=0,1,2$, are expected to be severely su…