TL;DR
This paper reviews recent experimental results on charm meson lifetimes and D-mixing, highlighting advances, discrepancies, and the implications of new measurements from collider and fixed-target experiments.
Contribution
It summarizes the latest measurements of charm lifetimes and D-mixing, discussing potential systematic effects and the impact of recent B-factory results on the understanding of charm physics.
Findings
Charm lifetime measurements are quite precise but show possible systematic discrepancies.
New D-mixing results suggest the mixing parameter y_CP is consistent with zero.
The strong phase difference in D0 decays remains a key factor in interpreting mixing data.
Abstract
A review of the latest results on charm lifetimes and D-mixing is presented. The e+e- collider experiments are now able to measure charm lifetimes quite precisely, however comparisons with the latest results from fixed-target experiments show that possible systematic effects could be evident. The new D-mixing results from the B-factories have changed the picture that is emerging. Although the new world averaged value of y_CP is now consistent with zero, there is still a very interesting and favoured scenario if the strong phase difference between the Doubly-Cabibbo-suppressed and the Cabibbo-flavoured D0 -> Kpi decay is large.
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