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${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ 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%

${{\mathit \eta}_{{{b}}}{(2S)}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ hadrons seen