Anomalies in decays induced by b c e- ve (e = e, micro, t) transitions may imply lepton flavor universality violations, which raises questions on such phenomena in the D decays induced by c (s,d)e+ ve transitions. Current measurements of the pure leptonic and semi-leptonic D decays agree with the standard model (SM) predictions, and such agreements can be used to constrain the new physics (NP) contributions. In this work, we extend SM by assuming general effective Hamiltonians describing the c (s,d) e+ ve transitions including the full set of t...
