Dispersive and absorptive CP violation in D0 − ¯D0 mixing

CP violation (CPV) in ... mixing is described in terms of the dispersive and absorptive "weak phases" ... They parametrize CPV originating from the interference of D0 decays with and without dispersive mixing, and with and without absorptive mixing, respectively, for CP conjugate hadronic final states f, ¯f. These are distinct and separately measurable effects. For CP eigenstate final states, indirect CPV only depends on ... (dispersive CPV), whereas ... (absorptive CPV) can only be probed with non-CP eigenstate final states. Measurements of the final state dependent phases ... determine the intrinsic dispersive and absorptive mixing phases ... The latter are the arguments of the dispersive and absorptive mixing amplitudes M12 and Γ12, relative to their dominant (ΔU = 2) U -spin components. The intrinsic phases are experimentally accessible due to approximate universality: in the SM, and in extensions with negligible new CPV phases in Cabibbo favored/doubly Cabibbo suppressed (CF/DCS) decays, the deviation of ... is negligible in CF/DCS decays ... and below 10% in CF/DCS decays ... (up to precisely known ... O(εK) corrections). In singly Cabibbo suppressed (SCS) decays, QCD pollution enters at O(ε) in U-spin breaking and can be significant, but is O(ε2) in the average over f = K+K−, π+π−. SM estimates yield ... A fit to current data allows O(10) larger phases at 2σ, from new physics. A fit based on naively extrapolated experimental precision suggests that sensitivity to ... in the SM may be achieved at the LHCb Phase II upgrade.