${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M049

${{\mathit \Upsilon}{(1S)}}$

$I^G(J^{PC})$ = $0^-(1^{- -})$ 
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${{\mathit \Upsilon}{(1S)}}$ MASS $9460.40$ $\pm0.10$ MeV 
 
${{\mathit \Upsilon}{(1S)}}$ WIDTH $54.02$ $\pm1.25$ keV 
 
▸  ${{\mathit \Upsilon}{(1S)}}$ BRANCHING RATIOS
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ ($2.60$ $\pm0.10$ ) $\%$ 4384
 
$\Gamma_{2}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ ($2.39$ $\pm0.08$ ) $\%$ 4730
 
$\Gamma_{3}$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ ($2.48$ $\pm0.04$ ) $\%$ 4729
 
▸  Hadronic decays
▸  Radiative decays
▸  Lepton Family number ($\mathit LF$) violating modes
▸  Other decays
[1] The value is for the sum of the charge states or particle/antiparticle states indicated.
[2] 2${\mathit m}_{{{\mathit \tau}}}<$ M(${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$) $<$ 9.2 GeV
[3] 2 GeV $<$ ${\mathit m}_{{{\mathit K}^{+}} {{\mathit K}^{-}}}<$ 3 GeV
[4] ${{\mathit X}}{{\overline{\mathit X}}}$ = vectors with $\mathit m$ $<3.1$ GeV
[5] ${{\mathit X}}$ and ${{\overline{\mathit X}}}$ = zero spin with ${\mathit m}_{\mathrm {}}$ $<$ 4.5 GeV
[6] 1.5 GeV $<$ ${\mathit m}_{{{\mathit X}}}<$ 5.0 GeV
[7] ${{\mathit A}^{0}}$ = scalar with ${\mathit m}_{\mathrm {}}$ $<8.0$ GeV
[8] 201 MeV $<$ M(${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$) $<$ 3565 MeV
[9] 0.5 GeV $<$ ${\mathit m}_{{{\mathit X}}}<$ 9.0 GeV, where ${\mathit m}_{{{\mathit X}}}$ is the invariant mass of the hadronic final state.