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${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS (including possibly non- ${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)

INSPIRE

${{\mathit \Upsilon}{(1S)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$

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${{\mathit \Upsilon}{(1S)}}$ MASS   $9460.30 \pm0.26$ MeV (S = 3.3)

${{\mathit \Upsilon}{(1S)}}$ WIDTH   $54.02 \pm1.25$ keV

${{\mathit \Upsilon}{(1S)}}$ Decay Modes ▸ Expand all decays
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$   $(2.60\pm{0.10})\%$ 4384   $\Gamma_{2}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$   $(2.38\pm{0.11})\%$ 4730   $\Gamma_{3}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$   $(2.48\pm{0.05})\%$ 4729   ▸ Hadronic decays ▸ Radiative decays ▸ Lepton Family number ($\mathit LF$) violating modes ▸ Other decays
FOOTNOTES