Measurement of the CKM angle γ using the B ^± → D ^* h ^± channels

A measurement of the CP-violating observables from B ^± → D ^* K ^± and B ^± → D ^* π ^± decays is presented, where D ^*(D) is an admixture of D ^*0 and D¯ ^{∗ 0} (D ⁰ and D¯) states and is reconstructed through the decay chains D ^* → Dπ ⁰ /γ and D→KS0π+π−/KS0K+K− . The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. The data sample used was collected by the LHCb experiment in proton-proton collisions and corresponds to a total integrated luminosity of 9 fb⁻¹ at centre-of-mass energies of 7, 8 and 13 TeV. The CKM angle γ is determined to be (69−14+13)∘ using the measured CP-violating observables. The hadronic parameters rBD∗K±,rBD∗π±,δBD∗K±,δBD∗π± , which are the ratios and strong phase differences between favoured and suppressed B ^± decays, are also reported. [Figure not available: see fulltext.]