Mixing in the D0 system - Results from collider experiments

TL;DR

This paper reviews experimental results on D0 meson mixing from collider experiments, which could reveal new physics beyond the Standard Model, focusing on measurements of mixing parameters x and y.

Contribution

It summarizes recent measurements of D0 mixing parameters from BABAR, Belle, and CLEO, highlighting advancements in experimental precision and sample purity.

Findings

No definitive observation of D0 mixing yet.

Measured values of x and y are consistent with Standard Model predictions.

Experimental techniques have improved sensitivity to small mixing effects.

Abstract

Mixing in the D0 system may provide a sensitive probe for new physics beyond the Standard Model (SM) but has so far eluded experimental observation. The SM predictions are typically small (< 10^{-3}) for the mixing parameters x, y which, in the absence of charge-parity (CP) symmetry violation, measure the mass (x= Delta(m)/Gamma) and lifetime (y= Delta(Gamma)/2Gamma) difference of the CP eigenstates in the D0 system. The asymmetric B-factory experiments BABAR and Belle open up the opportunity of measuring x, y with unprecedented statistical precision and sample purities. Results from BABAR and Belle, and from CLEO are reviewed.