Measurements of charm mixing, CP violation using D-0 -> K-+/-pi(-/+) decays

Measurements of charm mixing, CP violation parameters from the decay-time-dependent ratio of D-0 -> K+pi(-) to D-0 -> K-pi(+) decay rates, the charge-conjugate ratio are reported. The analysis uses (B) over bar -> D*(+) mu X-, charge-conjugate decays where D *(+) -> D-0 pi(+), D-0 -> K-+/-pi(-/+). The pp collision data are recorded by the LHCb experiment at center-of-mass energies root s = 7 8 TeV corresponding to an integrated luminosity of 3 fb(-1). The data are analyzed under three hypotheses: (i) mixing assuming CP symmetry (ii) mixing assuming no direct CP violation in the Cabibbo-favored or doubly Cabibbo-suppressed decay amplitudes, (iii) mixing allowing either direct CP violation and/or CP violation in the superpositions of flavor eigenstates defining the mass eigenstates. The data are also combined with those from a previous LHCb study of D-0 -> K pi decays from a disjoint set of D*(+) candidates produced directly in pp collisions. In all cases the data are consistent with the hypothesis of CP symmetry.