QUARKS
INSPIRE search

${\boldsymbol {\boldsymbol b}}$ $I(J^P)$ = $0(1/2^{+})$ 

  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   $53.94 \pm0.12$