${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states) 		INSPIRE   JSON PDGID:
M177

${{\mathit \Upsilon}_{{{2}}}{(1D)}}$

$I^G(J^{PC})$ = $0^-(2^{- -})$ 

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)
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ seen 679
 
$\Gamma_{2}$ ${{\mathit \gamma}}{{\mathit \chi}_{{{bJ}}}{(1P)}}$ seen 300
 
$\Gamma_{3}$ ${{\mathit \eta}}{{\mathit \Upsilon}{(1S)}}$ not seen 426
 
$\Gamma_{4}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Upsilon}{(1S)}}$ ($6.6$ $\pm1.6$) $ \times 10^{-3}$ 623