Studies of Lepton Flavor Violation at the LHC

Abstract

We examine the charged lepton flavor violating process $gg \rightarrow μ^\pm τ^\mp$ at the $\sqrt{s} = 13$ TeV LHC. Operators generating this process can be induced by new physics (NP) at dimension 8. Despite the power suppression associated with dimension 8 operators, we show that the LHC's large gluon luminosity makes it possible to probe this channel. For an integrated luminosity of 100 fb$^{-1}$ at the LHC, we predict a constraint on the NP scale $Λ\gtrsim 3$ TeV. In addition, we point out that such operators can be induced through top quark loops in models that generate dimension 6 operators of the form $\overline{t} t \, μτ$. We find that the NP scale of these dimension 6 operators can be constrained to be $Λ\gtrsim 3.4-4.1$ TeV with 100 fb$^{-1}$ of data.

Updated version 2, published in PLB. 7 pages, 2 figures