${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M200

${{\mathit \eta}_{{{b}}}{(2S)}}$

$I^G(J^{PC})$ = $0^+(0^{- +})$ 
Quantum numbers shown are quark-model predictions.
${{\mathit \eta}_{{{b}}}{(2S)}}$ MASS   $9999 \pm4$ MeV 
 
${\mathit m}_{{{\mathit \Upsilon}{(2S)}}}–{\mathit m}_{{{\mathit \eta}_{{{b}}}{(2S)}}}$   $24 \pm4$ MeV 
 
${{\mathit \eta}_{{{b}}}{(2S)}}$ WIDTH   $<24$ MeV  CL=90.0%
 
$\Gamma_{1}$ hadrons   seen  
 
FOOTNOTES