ATLAS collaboration (2861 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroMachado Miguens, JoanaMaio, AméliaManeira, JoséOleiro Seabra, Luis FilipeOnofre, AntónioPedro, RuteSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-042019-02-042016-10-04http://dx.doi.org/10.1140/epjc/s10052-016-4385-1http://hdl.handle.net/10400.26/27151A search is performed for a heavy particle decaying into different flavour dilepton pairs ( $e\mu $ , $e\tau $ or $\mu \tau $ ), using 3.2 fb$^{-1}$ of proton–proton collision data at $\sqrt{s}=13$  TeV collected in 2015 by the ATLAS detector at the Large Hadron Collider. No excess over the Standard Model prediction is observed. Limits at the 95 % credibility level are set on the mass of a $Z^\prime $ boson with lepton-flavour-violating couplings at 3.0, 2.7 and 2.6 TeV, and on the mass of a supersymmetric $\tau $ sneutrino with R-parity-violating couplings at 2.3, 2.2 and 1.9 TeV, for $e\mu $ , $e\tau $ and $\mu \tau $ final states, respectively. The results are also interpreted as limits on the threshold mass for quantum black hole production.engjournal article2019-02-04