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

TL;DR

This paper reports new measurements of B-hadron lifetimes and the width difference between B_s CP eigenstates using data from the Fermilab Tevatron, providing insights into heavy flavor physics.

Contribution

It presents the first measurements of B-hadron lifetimes in multiple decay modes and the width difference in B_s mesons at the Tevatron, advancing understanding of B-meson properties.

Findings

Measured B-hadron lifetimes in semileptonic and hadronic decays.

Determined the width difference between B_s CP eigenstates.

Provided experimental data consistent with Standard Model predictions.

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 D{\O}at 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 $J/\psi \phi$ is also presented.