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.
Matthias Finger, Konstantin Androsov, Jan Steggemann, Qian Wang, Anna Mascellani, Yiming Li, Varun Sharma, Xin Chen, Rakesh Chawla, Matteo Galli
Matthias Finger, Konstantin Androsov, Qian Wang, Jan Steggemann, Yiming Li, Anna Mascellani, Varun Sharma, Xin Chen, Rakesh Chawla, Matteo Galli