A first determination of the strong-phase difference between D-0 and (D) over bar0 -> K+K- pi(+)pi(-) is performed using e(+)e(-) -> psi(3770) -> D (D) over bar 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. 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 +/- 0.010(stat) +/- 0.008(syst). In addition, the branching fraction of D0. KthornK-p thornp- is measured to be o(2.863 +/- 0.028(stat) +/- 0.045(syst)) x 10(-3), which is twice as precise as previous results obtained at other experiments.
Measurement of the strong-phase difference between D0 and (D)over-bar0 → K+ K- π+ π- in bins of phase space
A. Amoroso;F. Bianchi;M. Destefanis;F. De Mori;M. Greco;L. Lavezzi;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2025-01-01
Abstract
A first determination of the strong-phase difference between D-0 and (D) over bar0 -> K+K- pi(+)pi(-) is performed using e(+)e(-) -> psi(3770) -> D (D) over bar 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. 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 +/- 0.010(stat) +/- 0.008(syst). In addition, the branching fraction of D0. KthornK-p thornp- is measured to be o(2.863 +/- 0.028(stat) +/- 0.045(syst)) x 10(-3), which is twice as precise as previous results obtained at other experiments.| File | Dimensione | Formato | |
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PhysRevD.112.012015.pdf
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