A first determination of the strong-phase difference between D0 and D0¯→K+K-π+π- is performed using e+e-→ψ(3770)→DD¯ data collected by the BESIII detector corresponding to an integrated luminosity of 20.3 fb-1. The measurements are made in four pairs of bins in phase space, which are chosen to provide optimal sensitivity to the angle γ of the unitarity triangle in B±→DK± decays. From these measurements, it follows that the CP-even fraction of the decay is F+=0.754±0.010stat±0.008syst. In addition, the branching fraction of D0→K+K-π+π- is measured to be (2.863±0.028stat±0.045syst)×10-3, which is twice as precise as previous results obtained at other experiments.

Measurement of the strong-phase difference between D0 and D0 ¯ -->k K-p p- in bins of phase space

Garzia, I.;
2025

Abstract

A first determination of the strong-phase difference between D0 and D0¯→K+K-π+π- is performed using e+e-→ψ(3770)→DD¯ data collected by the BESIII detector corresponding to an integrated luminosity of 20.3 fb-1. The measurements are made in four pairs of bins in phase space, which are chosen to provide optimal sensitivity to the angle γ of the unitarity triangle in B±→DK± decays. From these measurements, it follows that the CP-even fraction of the decay is F+=0.754±0.010stat±0.008syst. In addition, the branching fraction of D0→K+K-π+π- is measured to be (2.863±0.028stat±0.045syst)×10-3, which is twice as precise as previous results obtained at other experiments.
2025
Ablikim, M.; Achasov, M.  n.; Adlarson, P.; Afedulidis, O.; Ai, X.  c.; Aliberti, R.; Amoroso, A.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2600819
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