Time Dependent B0 B0-bar Mixing at CDF

TL;DR

This paper reports two measurements of the B0-B0-bar mixing parameter Delta m_d at CDF using different event samples and flavor tagging methods, resulting in a combined value with uncertainties.

Contribution

The paper introduces two independent measurements of Delta m_d using novel tagging and event selection techniques, providing a more precise average value.

Findings

Measured Delta m_d = 0.466 ps^{-1} with uncertainties

Used B -> nu l D(*) events with flavor tagging

Used dilepton events for measurement

Abstract

We describe two measurements of Delta m_d. The first uses B -> nu l D(*) events and a same-side flavor tagging algorithm. The second uses dilepton events. From the average of these two measurements we find Delta m_d = 0.466 +- 0.037 +- 0.031 ps^{-1}.