# $D s$ Lifetime, $m b$, $m c$ and $|V {cb}|$ in the Heavy Quark Expansion

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We present some straightforward applications of the QCD heavy quark expansion, stated in previous papers 1-3, to the inclusive widths of heavy flavour hadrons. We address the question of the $D s$ lifetime and argue that - barring Weak Annihilation (WA) - $\tau (D s)$ is expected to exceed $\tau (D^0)$ by several percent; on the other hand WA could

Autor: I. I. Bigi; N. G. Uraltsev

Fuente: https://archive.org/