QUARKS INSPIRE   JSON  (beta) PDGID:
Q005

${\mathit {\mathit b}}$

$I(J^P)$ = $0(1/2^{+})$ 
  Charge = $−{1\over 3}$ $\mathit e$ Bottom = $−$1
${\mathit {\mathit b}}$-QUARK MASS   $4.18 {}^{+0.03}_{-0.02}$ GeV 
 
${\mathit m}_{{{\mathit b}}}/{\mathit m}_{{{\mathit s}}}$ MASS RATIO   $53.88 \pm0.12$  
 
FOOTNOTES