D0barD0 Quantum Correlations, Mixing, and Strong Phases

TL;DR

This paper investigates quantum correlations between D0 and D0bar mesons produced at the psi(3770) resonance, measuring decay rates and phases to understand charm mixing and decay dynamics.

Contribution

It provides the first measurements of absolute branching fractions and the strong phase delta for D0 decays using quantum-correlated data from CLEO-c.

Findings

Measured absolute branching fractions for various D0 decay modes.

Determined the cosine of the strong phase delta for D0 to K- pi+ decays.

Placed limits on the charm mixing parameter y.

Abstract

Due to the quantum correlation between the pair-produced D0 and D0bar from the decay of the psi(3770), the time-integrated single and double tag decay rates depend on charm mixing amplitudes, doubly-Cabibbo-suppressed amplitudes, and the relative strong phase delta between D0 and D0bar decays to identical final states. Using 281 pb^{-1} collected with the CLEO-c detector on the psi(3770) resonance, we measure the absolute branching fractions of D0 decays to hadronic flavored states, CP eigenstates, and semileptonic final states to determine the relative strong phase, cos delta, of the K- pi+ final state and to limit the mixing amplitude y. The results presented in this document are preliminary.