QUARKS

#### ${\mathit {\mathit b}}$

$I(J^P)$ = $0(1/2^{+})$
 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 $53.94 \pm0.12$
 FOOTNOTES