${\boldsymbol {\boldsymbol b}}$ ${\boldsymbol {\overline{\boldsymbol b}}}$ MESONS(including possibly non- ${\boldsymbol {\boldsymbol q}}$ ${\boldsymbol {\overline{\boldsymbol q}}}$ states) INSPIRE search

# ${{\boldsymbol \Upsilon}_{{2}}{(1D)}}$ $I^G(J^{PC})$ = $0^-(2^{- -})$

was ${{\mathit \Upsilon}{(1D)}}$
First observed by BONVICINI 2004 in the decay to ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ and confirmed by DEL-AMO-SANCHEZ 2010R in the decay to ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Upsilon}{(1S)}}$ . Data consistent with $\mathit J{}^{P} = 2{}^{-}$. The states with $\mathit J = 1$ and 3 also possibly seen, but need confirmation.