Refine
Year of publication
Language
- English (218)
Has Fulltext
- yes (218)
Is part of the Bibliography
- no (218)
Keywords
- BESIII (15)
- e +-e − Experiments (11)
- Branching fraction (10)
- Hadronic decays (5)
- Particle and Resonance Production (5)
- Quarkonium (5)
- Charm Physics (4)
- Exotics (4)
- Spectroscopy (4)
- Branching fractions (3)
Institute
- Physik (217)
A measurement of the 𝐶𝑃-even fraction of the decay 𝐷0→𝜋+𝜋−𝜋+𝜋− is performed with a quantum-correlated 𝜓(3770)→𝐷¯𝐷 data sample collected by the BESIII experiment, corresponding to an integrated luminosity of 2.93 fb−1. Using a combination of 𝐶𝑃 eigenstates, 𝐷→𝜋+𝜋−𝜋0 and 𝐷→𝐾0𝑆,𝐿𝜋+𝜋− as tagging modes, the 𝐶𝑃-even fraction is measured to be 𝐹4𝜋+=0.735±0.015±0.005, where the first uncertainty is statistical and the second is systematic. This is the most precise determination of this quantity to date. It provides valuable model-independent input for the measurement of the angle 𝛾 of the Cabibbo-Kobayashi-Maskawa matrix with 𝐵±→𝐷𝐾± decays, and for time-dependent studies of 𝐶𝑃 violation and mixing in the 𝐷0−¯𝐷0 system.