${\boldsymbol {\boldsymbol b}}$ ${\boldsymbol {\overline{\boldsymbol b}}}$ 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.
${{\mathit \Upsilon}_{{2}}{(1D)}}$ MASS   $10163.7 \pm1.4$ MeV (S = 1.7)
$\Gamma_{1}$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$  seen 679
$\Gamma_{2}$ ${{\mathit \gamma}}{{\mathit \chi}_{{bJ}}{(1P)}}$  seen 300
$\Gamma_{3}$ ${{\mathit \eta}}{{\mathit \Upsilon}{(1S)}}$  not seen 426
$\Gamma_{4}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Upsilon}{(1S)}}$  $(6.6\pm{1.6})\times 10^{-3}$ 623