Lifetimes of some $b$-flavored hadrons

Recent measurements of lifetimes of some $b$-flavored hadrons are presented and interpreted in the context of theoretical models, especially the Heavy Quark Expansion. Decay widths and decay width differences in the $B_s^0-\overline{B}_s^0$ system are discussed from studies of decays into the final states $J/\psi K^+K^-$, $J/\psi \pi^+\pi^-$, $D_s^+D_s^-$, $K^+K^-$, and $D_s^{\pm}\pi^{\mp}$. Lifetime measurements of the baryons $\Lambda_b^0$, $\Xi_b^-$, $\Xi_b^0$, and $\Omega_b^-$ are also shown.