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The decay-time-dependent CP asymmetry in B-0 -> (DD -/+)-D-+/- decays is mea- sured using a data set corresponding to an integrated luminosity of 9 fb(-1) recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The CP parameters are measured asSDD=-0.861 +/- 0.077 +/- 0.019,Delta SDD=0.019 +/- 0.075 +/- 0.012,CDD=-0.059 +/- 0.092 +/- 0.020,Delta CDD=-0.031 +/- 0.092 +/- 0.016,ADD=0.008 +/- 0.014 +/- 0.006. The analysis provides the most precise single measurement of CP violation in this decay channel to date. All parameters are consistent with their current world average values.
Marie Theres Christin Bachmayer
Jan Steggemann, Konstantin Androsov, Anna Mascellani, Joanna Malgorzata Wanczyk, Paul Théodore Gabriel Pablo De Bryas Dexmiers d'Archiac
Aurelio Bay, Frédéric Blanc, Marie Theres Christin Bachmayer