B-Hadron Lifetimes and $\Delta \Gamma$ at the Tevatron

Abstract

We present new results on the lifetimes and widths of $B$ hadrons based on 300-450 pb${}^{-1}$ of data collected by CDF and DØat the Fermilab Tevatron. Lifetimes were measured in semileptonic decays as well as fully reconstructed hadronic modes. A new measurement of the width difference between $B_s$ CP eigenstates, $\Delta \Gamma /\bar{\Gamma }$, in $B_s$ decays to $J/\psi \varphi$ is also presented.

arXiv comment7 pages, 6 figures. Proceedings of the XXXXth Rencontres de Moriond: Electroweak Interactions and Unified