CP Violation and Mixing Results from FNAL E791

TL;DR

This paper reviews FNAL E791's experimental results on D0-D0bar mixing and CP violation in D meson decays, providing combined constraints and insights into these phenomena in particle physics.

Contribution

It presents new measurements and combined analysis of D0-D0bar mixing and CP violation, advancing understanding of charm meson behavior.

Findings

No significant CP violation observed.

Measured decay width difference  between mass eigenstates.

Combined data constrains mixing parameters.

Abstract

We review results from FNAL E791 concerning D0-D0bar mixing and CP violation in D meson decays. We have searched for mixing in semileptonic D0 -> K+\ell-\bar{\nu} decays and in hadronic D0 -> K+\pi- and D0 -> K+\pi-\pi+\pi- decays. We have searched for CP violation in D0 -> K+K- / \pi+\pi- and D+ -> \phi\pi+ / \bar{K}^{*0}K+ / K+K-\pi+ / \pi+\pi-\pi+ decays. Finally, we have measured the difference in decay widths \Delta\Gamma between the two mass-eigenstates of the D0-D0bar system. This parameter affects the rate of D0-D0bar mixing. We combine our results with those from other experiments to obtain confidence intervals incorporating all published experimental data.