We investigate trilepton final states to probe top anomalous couplings at the Large Hadron Collider. We focus on events originating from the associated production of a single top quark with a Z-boson, a channel sensitive to several flavor-changing neutral interactions of top and up/charm quarks. In particular, we explore a way to access simultaneously their anomalous couplings to Z- bosons and gluons and derive the discovery potential of trilepton final states to such interactions with 20 inverse fb of 8 TeV collisions. We show that effective coupling strengths of O(0.1-1) inverse TeV can be reached. Equivalently, branching fractions of top quarks into lighter quarks and gluons or Z-bosons can be constrained to be below O(0.1-1)%.
