Search for Lepton-Flavor Violation in Different-Flavor, High-Mass Final States in Pp Collisions at S =13 Tev With the Atlas Detector

Abstract

A search is performed for a heavy particle decaying into different-flavor, dilepton pairs (e?, e? or ??), using 36.1 fb-1 of proton-proton collision data at s=13 TeV collected in 2015-2016 by the ATLAS detector at the Large Hadron Collider. No excesses over the Standard Model predictions are observed. Bayesian lower limits at the 95% credibility level are placed on the mass of a Z? boson, the mass of a supersymmetric ?-sneutrino, and on the threshold mass for quantum black-hole production. For the Z? and sneutrino models, upper cross-section limits are converted to upper limits on couplings, which are compared with similar limits from low-energy experiments and which are more stringent for the e? and ?? modes. © 2018 CERN, for the ATLAS Collaboration.