## I. INTRODUCTION 

Measurements of flavor changing processes in meson decays are all in agreement with the Standard Model (SM) predictions. Such a situation is not expected if there is new physics at the TeV scale, unless its flavor structure resembles that of the SM. The strongest suppression of the new physics flavor effects would arise if all new flavor couplings were proportional to the SM Yukawa couplings, Y U and Y $^{D}$, an idea that became known as “minimal flavor violation” (MFV) [1–5] and which applies, for example, in several known supersymmetric models, such as gauge mediation. 

As concerns the lepton sector, the fact that no flavor changing neutral current (FCNC) decays of charged leptons have been observed suggests that a similar principle – minimal lepton flavor violation (MLFV) – might apply [6–10]. The existence of neutrino masses, however, implies that there are at least two possible scenarios of MLFV. It is quite likely that the seesaw mechanism, involving heavy singlet fermions with masses m$_{N}$ ≫ m$_{Z}$ , is responsible for the generation of the light neutrino masses. If the mass scale m$_{N}$ is lower than the scale of flavor dynamics, then there could be three relevant flavor violating matrices: The Yukawa matrix of the charged leptons Y $^{E}$, the Yukawa matrix of the neutrinos Y $^{N}$, and the heavy neutrino mass matrix M$_{N}$ . If m$_{N}$ is higher than the scale of flavor dynamics, then MLFV requires that all low energy flavor violating couplings are proportional to Y $^{E}$. In this work, we use the term MLFV for the latter scenario only. 

While the high p$_{T}$ experiments at the LHC, ATLAS and CMS, have not been constructed as flavor machines, the fact that they can identify electrons and muons with high precision makes them potentially powerful probes of lepton flavor physics. If new particles, with masses within the reach of the LHC, decay into the SM charged leptons, then ATLAS and CMS are uniquely capable of probing detailed features of the new particles, which may be crucial in understanding the underlying theory. This has been demonstrated for various classes of supersymmetric models [11–15]. (Implications of quark-related MFV for LHC phenomenology have also been explored [16–22].) 

In this work, we focus on an extension of the SM where there are heavy – but still within the reach of the LHC – vector-like doublet-leptons. MLFV gives strong predictions concerning the spectrum and the couplings of such new leptons. We analyze how, and to what extent, ATLAS and CMS can test the MLFV hypothesis with such new particles. 

