QUARKS INSPIRE   JSON PDGID:
Q005

${\mathit {\mathit b}}$

$I(J^P)$ = $0(1/2^{+})$ 
  Charge = $−{1\over 3}$ $\mathit e$ Bottom = $−$1
${\mathit {\mathit b}}$-QUARK MASS   $4.183 \pm0.007$ GeV  CL=90.0%
 
${\mathit m}_{{{\mathit b}}}/{\mathit m}_{{{\mathit s}}}$ MASS RATIO   $53.88 \pm0.12$  
 
FOOTNOTES