A measurement of the CP-even fraction of the decay D0→π+π-π+π- is performed with a quantum-correlated ψ(3770)→DD¯ 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→KS,L0π+π- as tagging modes, the CP-even fraction is measured to be F+4π=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-D¯0 system

Measurement of the CP-even fraction of D0→π+π−π+π−

Garzia, I.;
2022

Abstract

A measurement of the CP-even fraction of the decay D0→π+π-π+π- is performed with a quantum-correlated ψ(3770)→DD¯ 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→KS,L0π+π- as tagging modes, the CP-even fraction is measured to be F+4π=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-D¯0 system
2022
Ablikim, M.; Achasov, M.  N.; Adlarson, P.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M.  R.; An, Q.; Bai, X.  H.; Bai, Y.; Bakina, O.; Baldini Fer...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2505792
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