Updated model-independent measurement of the strong-phase differences between D0 and $$ {\overline{\textrm{D}}}^0\to {\textrm{K}}_{\textrm{S}/\textrm{L}}^0{\uppi}^{+}{\uppi}^{-} $$ decays

A bstract The strong-phase differences between $$ {D}^0\to {K}_{S(L)}^0{\pi}^{+}{\pi}^{-} $$ D 0 → K S L 0 π + π − and $$ {\overline{D}}^0\to {K}_{S(L)}^0{\pi}^{+}{\pi}^{-} $$ D ¯ 0 → K S L 0 π + π − decays are one of the most important inputs in measuring the CP violating angle γ via B − → DK − decays. They also play a key role in studies of charm mixing and indirect CP violation. In this paper, the strong-phase differences are determined in a model-independent way with quantum-correlated D 0 - $$ {\overline{D}}^0 $$ D ¯ 0 decays from 7.93 fb − 1 of e + e − annihilation data at $$ \sqrt{s} $$ s = 3 . 773 GeV by the BESIII experiment. These results are the most precise to date and are expected to significantly reduce associated uncertainties in determining the CP violating angle γ and related charm mixing parameters.

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