Tri-bimaximal-Cabibbo mixing: flavour violations in the charged lepton sector

The well understood structure of Upmns matrix mandates a Cabibbo mixing matrix in the first two generations of the charged lepton sector if we assume Tribimaximal mixing in the neutrino sector. This ansatz, called Tri-bimaximal-Cabibbo mixing, is ruled out immediately by the experiments searching for charged lepton flavour violating currents. In this article, we aim to show that the resurrection of the theoretically well motivatedTri-bimaximalmixing scenario comes naturally within Minimal Flavour Violation hypothesis in the lepton sector. We analyse the flavour violating currents mu. eee, mu T i. eT i, mu. e., p0. e + mu and KL. mu+e - in this scenario and show that the New Physics that generates mixing among the charged lepton could lie within the reach of hadron colliders. In the minimal field content scenario, though the most stringent constrain on New Physics is greater than or similar to O(10 TeV) for maximal coupling, considering more natural couplings relaxes it to greater than or similar to O(4 TeV). On the other hand, New Physics with the extended field content is even more strongly constrained to greater than or similar to O(75 TeV) for maximal coupling, while it gets relaxed to greater than or similar to O(31 TeV) for natural scenario.