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00925njm 22002777a 4500 dc LHCb Collaboration author Alfonso Albero, Alejandro author Calvo Gómez, Míriam author Camboni, Alessandro author Coquereau, Samuel author Garrido Beltrán, Lluís author Gascón Fora, David author Gironella Gironell, Pere author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author Vilasis-Cardona, Xavier author Marin Benito, Carla author 2020-05-25T13:23:42Z 2020-05-25T13:23:42Z 2019-08-07 2020-05-25T13:23:42Z Measurements of CP observables in B0 → DK∗0 decays are presented, where D represents a superposition of D0 and D¯¯¯¯0 states. The D meson is reconstructed in the two-body final states K+π−, π+K−, K+K− and π+π−, and, for the first time, in the fourbody final states K+π−π+π−, π+K−π+π− and π+π−π+π−. The analysis uses a sample of neutral B mesons produced in proton-proton collisions, corresponding to an integrated luminosity of 1.0, 2.0 and 1.8 fb−1 collected with the LHCb detector at centre-of-mass energies of s√=7,8 and 13 TeV, respectively. First observations of the decays B0 → D(π+K−)K∗0 and B0 → D(π+π−π+π−)K∗0 are obtained. The measured observables are interpreted in terms of the CP -violating weak phase γ. Hadrons Física de partícules Experiments Hadrons Particle physics Experiments Measurement of CP observables in the process B 0 → DK *0 with two- and four-body D decays