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K.Williams, IWilliams, M.Williams, M. R. J.Wilson, F. F.Wislicki, W.Witek, M.Witola, L.Wormser, G.Wotton, S. A.Wu, H.Wyllie, K.Xiang, Z.Xiao, D.Xie, Y.Xu, A.Xu, J.Xu, L.Xu, M.Xu, Q.Xu, Z.Xu, Z.Yang, D.Yang, S.Yang, Y.Yang, Z.Yang, Z.Yao, Y.Yeomans, L. E.Yin, H.Yu, J.Yuan, X.Yushchenko, O.Zaffaroni, E.Zavertyaev, M.Zdybal, M.Zenaiev, O.Zeng, M.Zhang, D.Zhang, L.Zhang, S.Zhang, S.Zhang, Y.Zhang, Y.Zharkova, A.Zhelezov, A.Zheng, Y.Zhou, T.Zhou, X.Zhou, Y.Zhovkovska, VZhu, X.Zhu, X.Zhu, Z.Zhukov, VZou, Q.Zucchelli, S.Zuliani, D.Zunica, G.2022-07-042022-07-042022-07-042022-05-2510.1103/PhysRevD.105.092013https://infoscience.epfl.ch/handle/20.500.14299/189062WOS:000810236400008A measurement of the ratios of the effective decay widths of D-0 -> pi(-)pi(+) and D-0 -> K- K+ decays over that of D-0 -> K-pi(+) decays is performed with the LHCb experiment using proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb(-1). These observables give access to the charm mixing parameters y(CP)(pi pi) - y(CP)(K pi )and y(CP)(KK) -y(CP)(K pi), and are measured as y(CP)(pi pi) - y(CP)(K pi) = (6.57 +/- 0.53 +/- 0.16) x 10(-3), y(CP)(KK) - y(CP)(K pi) = (7.08 +/- 0.30 +/- 0.14) x 10(-3), where the first uncertainties are statistical and the second systematic. The combination of the two measurements is Y-CP - y(CP)(K pi) = (6.96 +/- 0.26 +/- 0.13) x 10(-3), which is four times more precise than the previous world average.Astronomy & AstrophysicsPhysics, Particles & FieldsAstronomy & AstrophysicsPhysicsMeasurement of the charm mixing parameter y(CP)-y(CP)(K pi) using two-body D-0 meson decaystext::journal::journal article::research article