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A recent combination of measurements performed by the LHCb collaboration determined that = (63. 8^+3. 5-₃. ₇) ^. The fit combined the results of and charm measurements, which resulted in precision improvements for the strong-phase difference between D⁰ K^-^+ and D⁰ K^+^- decays, ₊^D, and the D⁰-D⁰ mixing parameter, y. In addition, new LHCb measurements of the CKM angle using B⁰ D K^*0 and B^- D^* K^- decays with the D Kₒ⁰ h^+ h^- final state (where h=, K) are presented.
Innes Mackay (Mon,) studied this question.